Texas Piney Woods

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Forest Range Types of Eastern North America
 

The fundamental and practical distinction between coniferous and deciduous forests is useful (and was used herein), but precise, non-arbitrary "lines" are impossible when presenting and discussing forest range types in the eastern half of the continent. This is especially the case when climax or potential natural vegetation is used as the basis for forest types (ie. when cover types, or the more specific management cover types, are discussed as being more or less synonymous with permanent forest types). As discussed in detail below, the epic work of Lucy Braun (1950) is still the definitive basis for the ecological discussion and classification of those North American forests which extend from the Atlantic Coast to slightly beyond the Missouri and Mississippi River drainages. Braun (1950) included all the coniferous forests (forest types, regions, etc.)-- the generic "southeastern pine region"--as part of her one Deciduous Forest Formation. 

The forest range types included in the following section include coniferous, deciduous, and mixed coniferous-deciduous forests. This is confusing but unavoidable given the nature of the vegetation and the standard understanding (the Braun interpretation) of ecological relations and classification of  this forest vegetation. Most of the southeastern pine types presented are management cover types maintained silviculturally as more economically valuable coniferous forests rather than as the climax mixed hardwood-pine forest types. In other words, efforts were made to fit the Society of American Foresters (1980) cover types with the climax types of Braun (1950) and the potential natural vegetation units of Kuchler (1966).      

The major forest communities or forest zones of eastern North America are broad or wide in their spatial patterns unlike the narrow zonation characteristic of the forests of western North America. The “young” mountains of the western part of the continent are taller (in fact, still getting taller) and as a result have more elevation-based zonation of vegetation than do the geologically older and more eroded (lower) eastern mountains such as the Applachians or Ozarks. So too, are the soils of the Atlantic Coast more zonal (ie. major soil units are larger or broader in spational dimension like those of the vast continental interior whereas soils of the Rocky Mountains and the Pacific Slope ranges are more of the intrazonal spatial scale. See for illustration the national soil map of dominant soil orders and suborders (Soil Survey Staff, 1998).

 Vankat (1979, p. 137) wrote that relief within the eastern deciduous forest “is quite variable” yet earlier Vankat (1979, p. 41) had also correctly noted that “low hills “ were characteristic of much of this deciduous forest region. Again, contrast this with the extreme physiography of the Rockys or Sierra Nevada-Cascade Ranges.

The classic and still-definitive work on forests of eastern North America (approximately east of the 98th meridian) is the life’s work of Dr. Lucy Barun (1950). Braun interpreted this entire vegetation as one great forest formation existing as a mosaic of forest regions which in turn were made up of community units that she labeled variously as belts, areas, districts, sections, divisions, etc.    

“The Deciduous Forest Formation of eastern North America is a complex vegetation unit most conspicuously characterized by the prevalence of the deciduous habit of most of its woody constituents. This gives to it a certain uniformity of phsiognomy, with alternating summer green and winter leafless aspects. Evergreen species, both broad-leaved and needle-leaved, occur in the arboreal and shrub layers, patticularly in seral stages  and in marginal and transitional areas. They are not, however, entirely lacking even in some centrally loocated climax communities” (Braun, 1950, p. 31). “The Deciduous Forest Formation is made up of a number of climax associations differing from one another in floristic compositon, in physiogonomy, and in genesis or historical origin. While the delimitation of associations may be made on a basis of dominant species, and it is from these that the climax is named, dominants alone fo not suffice for the recognition of these units. … Although the delimitation in space of an association is difficult, if not impossible, it is entirely possible to recognize and to map forest regions which are characterized by the prevalence of specific climax types, or by mosaics of types. These regions are natural entities, generally with readily observable natural boundaries based on vegetational features. … Forest regions must not be confused with climax associations. Even though a region is named for the climax association normally developing within it, it should not be assumed that the region is coextensive with the area where that climax can develop. Each of the several climaxes, although characterizing a specific region, nevertheless occurs in other regions.” (Braun, 1950, p. 33-34). Braun (1950, ps. 35-37) listed nine forest regions making up the Deciduous Forest Formation of eastern North America:

                1. Mixed Mesophytic Forest Region,

                2. Western Mesophytic Forest Region,

                3. Oak-Hickory Forest Region,

                4. Oak-Chestnut Forest Region,

                5. Oak Pine Forest Region,

                6. Southeastern Evergreen Forest Region,

                7. Beech-Maple Forest Region,

                8. Maple-Basswood Forest Region, and

                9. Eastern Hemlock-Eastern White Pine-Northern Hardwoods Region.

 Braun (1950, ps. 11-12) interpreted these same combinations of species as forest communities at the scale (both spatial, mostly, and, also, temporal) of climax association  from which, as quoted immediately above, Braun derived the names of forest regions. Braun (1950, ps. 11-12) distinguished between the association-abstract and the association-concrete, a distinction discussed in the review of the derivation of vegetation cover type from the concept of plant association. The Braun association is the association of F.E. Clements. Indeed the entire ecological paradigm on which Braun (1950, ps. 10-15) based her monographic treatment of the North American Deciduous Formation is Clementisan except allowance for and inclusion of edaphic and physiographic climaxes of Cowles, Tansley, etc.  Vankat (1979, ps. 137-150) and Delcourt and Delcourt in Barbour and Billings (2000, ps. 365-378) described eastern deciduous forest vegetation under the Braun (1950) associations of the Clementsian model.

It is important to bear in mind that the Braun associations can occur in more than the one forest region bearing the name of the association (eg. the Oak-Pine Association commonly occurs and the Maple-Basswood Association infrequently occurs in parts of the Oak-Hickory Forest Region).

Several of the species combinations that delineate deciduous forest regions and associations were also used as forest cover types by the Society of American Foresters (Eyre, 1980) as for example White Pine-Hemlock (SAF 22), White Pine-Northern Red Oak-Red Maple (SAF 20), Sugar Maple-Basswood (SAF 26), and Beech-Sugar Maple (SAF 60). The Society of American Foresters emphasized that it’s forest cover types were “based on existing tree cover” (… forest as they are today…”) and that some types may be climax while others are “transitory” (ie. seral stages leading to another climax).

Braun (1950, p. xiii) specified: “Some of the communities for which composition is given are readily referable to ‘forest cover types’ as defined by the Society of American Foresters”. She then added, “However, an attempt to classsify all communities as to ‘cover types’ would be artificial” and often impossible. Undoubtedly this was due to the differences in classification by Braun’s climax basis (with seral communities clearly specified) versus the existing or present-day forest communities basis of the SAF.

 The Society for Range Management (Shiflet, 1994, p. xi) also specified the criterion of “existing vegetation” and that some rangeland cover types are climax and others are seral. The author of this collection of photographs and descriptions repeatedly reminded readers of this situation, but specified that most of the rangeland and forest cover types included herein were climax vegetation. That criterion exist for forest range types of the Eastern Deciduous forest Formation with most photographs being of either old-growth or second-growth forest with climax species composition as described in the classic literature such as Braun (1950) or Shelford (1963, ps. 17-119).

The nine forest regions of Braun (1950, ps. 35-37) were retained with little modification as series in the fairly comprehensive suystem of vegetation (primarily, climax; secondly, disclimax or subclimax) used in A Classification of North American Biotic Communities by Brown et al. (1998). Their organization of the Eastern Deciduous Forest Formation was: Oak-Hickory Series, Oak-Chestnut Series, Beech-Maple Series, Oak-Pine Series, Maple-Basswood Series, and Hemlock-white Pine-Mixed Hardwood Series within the Northeastern Deciduous Forest biotic community and Mixed Mesophytic Series and Pine Series within the Southeastern Deciduous and Evergreen Forest biotic community. The Brown et al. (1998) series were included following SAF and/or SRM cover type designations. Additional designations as for forest wetlands were shown as required.

 
Historical Footnote and Editorial
 
The consistent and persistent use of the eastern deciduous forest associations of Braun (1950) by the foremost contemporary ecologists provides the beginning student of Ecology with a textbook example of the necessity of learning the fundamental concepts— and the language(s) thereof —that are the foundation of his selected field of Biology. No ecological monograph, including those of John E. Weaver or Victor E. Shelford, ever used Clementsian concepts and terminology any more consistently or with any more practical application than did Braun (1950). All three of these (and there were others besides these) patriarchal ecologists of North American vegetation left future generations with not only the seminal but also the definitive treatises of the communities to which they devoted their professional lives

Their like, their genre of comprehensive, panaramic, descriptive, first-hand accounts of vegetation on this grand scale, will not likely appear again before icicles hang in Hell. The contemporary research world is hung up on numbers, even generated or simulated (vs. real data) numbers often for numbers-sake alone, and especially numbers of publications. This has gone beyond Lord Kelvin’s admonition to “express it in numbers”,  (indeed Kelvin used actual numbers derived from physical experiments) to the point that quantity is everything and quality (always subsidary to quantity) itself is based on numbers. Not only is there little room for Descriptive Ecology, but there is hardly more for descriptive analysis of experiments and observations because the gold-standard of refereed publications has descended, has been perverted, to the quantitative entity of LPU (Lowest Publishable Unit). A natural length paper based on objectives of the study is split into as many LPUs as possible to extend the author’s bibliography. This procedure does not allow enough results to be included in any one paper to allow a discussion of  findings from a comprehensive perspective. Besides the experimental procedure (complete with lots of numbers and split-nine-ways-to-Sunday replications) is the most important part according to anonymous peer-reviewers.  

In an institutional culture where “Publish or Perish” has become prostituted to a realm of pot-boiler papers written from predictable-outcome, piss-ant projects the next generation of Brauns, Weavers, Shelfords are “dead meat” if they devote (ie. sacrifice) their careers to document for eternity the kind of knowledge their “takes a lifetime “ research produced. Such incredible work is left to not only the fully vested or tenured but the tenured full professor of independent financial means at career’s end (and then there is not enough time left to do the work). A key factor in the creative genius and amazing productivity of Frederic E.Clements was that he was able to spend most of his career working for the rich Carnegie Foundation which freed him from the routine of classroom teaching and daily chores of academia thereby enabling him the luxury of a self-proclaimed “escaped professor” (Brewer, 1988, p. 503).  Alternatively, the most lasting and useful research is the province of the academic martyr to whom pursuit of knowledge or satisfaction of curiosity are of higher utility than organizational rank and its financial renumeration.

 Thus the Ecology student is left with the classical works of those “giants in the earth” who reigned when knowledge was the domain of a more leisurely, honest, genteel, and collegial time and culture.

The scholar of biblical texts cannot read just the several English translations of the Holy Bible. He must also understand the native tongues of Hebrew, Arabic, or Greek in which Holy Writ was written. So too with the “scripture” of Ecology. And the language of vegetation, at least North American vegetation, is Clementsian. The serious student of vegetation must be knowledgable and conversant in this language given that so much of the all-encompassing vegetation literature was written predominately from the view of Clementsian Ecology (and vocabulary). These original, monographic works remain the basis, however distant, of current investigations or even classifications of vegetation. The basic ecological concepts in such natural resource fields as Range Management and Forestry remain Clementsian at root (eg. the Clementsian association is the basis of the forest and range cover types as used in North America).

Any who would refuse to familarize themselves with Clementsian Ecology because there are exceptions to and alternative models for some of its general, long temporal-large spatial scales traverse the terrain of ecological literature half blind. In their zeal to reform the basic vegetation paradigm to include, justifiably, the exceptions they end up “throwing the baby out with the bath water”.

 

1. Bayou range in the core of Texas Big Thicket- This frequently flooded bottomland site has high clay content soils that dry rapidly (due to high evapo-transpiration rates) creating an understory dominated by dwarf palmetto (Sabal minor). The tree layer defines this laurel oak (Quercus laurifolia)-overcup oak (Q. lyrata)-loblolly pine (Pinus taeda) forest range type. This is an edaphic climax as viewed from the perspective of polyclimax theory.

Little Pine Island Bayou, Big Thicket National Preserve, Hardin County, Texas. May. FRES No. 16 (Oak-Gum-Cypress Ecosystem).One of many variants of K-103 (Southern Flood-Plain Forest). One of the numerous variants of SAF 82 (Loblolly Pine-Hardwood). Oak-Pine Series in Northeastern Deciduous Forest biotic community (even though in southeastern part of continent; an Oak-Pine Series for Southeastern Deciduous and Evergreen Forest biotic community would seem warrented) of Brown et al. (1998). South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).
 

2. Climatic (= regional) climax of Texas Big Thicket— American beech (Fagus grandifolia)-southern magnolia (Magnolia grandiflora)-white oak (Quercus alba)-loblolly pine forest. In Clementsian monoclimax theory this is the ultimate formation, the endpoint of vegetation development to which all vegetation of this region converges. It is the climax on mesic, level, upland areas. Trees left to right: southern red oak (Quercus falcata var. pagodifolia), magnolia, loblolly pine and beech. Lance Rosier Unit, Big Thicket National Preserve, Hardin County, Texas. May. This magnificant forest cover type was apparently too small for FRES or Kuchler to "pigeon-hole". As it is one of the southern forest types with a pine as one dominant species it would have to be included in FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem) with K-101 (Oak-Hickory-Pine Forest) being the Kuchler equivalent listed thereunder.However, the close "kinship" of this forest to the mixed mesophytic and mixed hardwoods forests (both in the Southeastern Evergreen Forest Region) and to the mixed mesophytic forest in the Southern Appalachians of the Oak-Chestnut Forest Region (Braun, 1950, ps. 199-205, 297-303) strongly suggested that this cover type most closely fit Kuchler–95 (Applalachian Oak Forest) which is an equivalent under FRES 15 (Oak-Hickory Forest Ecosystem).

Frankly, it seemed surprising to this author that Kuchler did not give a more specific designation for this major, though restricted, type given that Braun (1950, p. 445) specified that it could be seen as a separate association the same as for the Oak-Hickory Association and the Beech-Maple Association both of which have FRES and Kuchler recognitions. (Braun [1950, ps. 443-445] placed the Beech-Magnolia climax in the Mixed Mesophytic Association as transitional between Deciduous and Broad-leaved Evergreen Formations.) The Society of American Foresters (1980) also missed this one. The closest SAF forest cover type is probably 82 (Loblolly Pine- Hardwood) but that is not close enough. Beyond any doubt beech and magnolia are the recognized dominants and the pine is the least of the dominants. Only with man-set prescribed fire could the loblolly pine be maintained at higher proportions of the climax community.This is primarily a hardwood type and certainly not a pine-oak type. Braun (1950, ps. 300-303, enclosed map) discussed and mapped the beech-magnolia forest as part of the Southeastern Evergreen Forest Region. Braun did not map at association levels. Perhaps western island of Mixed Mesophytic Series in Southeastern Deciduous and Evergreen Forest biotic community of Brown et al. (1998). South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).
 
3. Climax mixed mesophytic forest (the beech-magnolia-loblolly pine type)—This is the westernmost extension of a forest type dominant in the Great Smokey Mountains and Applachian region. Tree in foreground is American beech; trees on far left are magnolia. Lance Rosier Unit, Big ThicketNational Preserve, Hardin County, Texas, May. Mesic site. FRES and Kuchler recognitions (lack thereof) discussed immediately above. Variant of SAF 82 (Loblolly Pine-Hardwood). Oak-Pine Series of Brown et al. (1998) (but should be for Southeastern Deciduous and Evergreen Forest biotic community). South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).
 

4. Climax of the mixed mesophytic forest- In the Clementsian concept of climax (ie. a monoclimax or regional climax determined primarily by climate) the ultimate expression of potential natural vegetation of the deep pineywoods (general hardwood, namely oak,-pine forest) is a mixing of this regional climax with elements of the mixed mesophytic forest to the east. In this species-rich forest vegetation southern magnolia and American beech join with white oak (and several other oak species as shown below) and loblolly pine to form a unique forest range community that can be visualized as postclimax (ie. more mesic than the general climax of the area or region) as was explained by braun (1950, p.13).

This photograph of a mixed mesophytic X white oak-loblolly pine forest (ie. an overlapping or ecotone of these two was on a locally wet site and featured a large, old southern magnolia (foremost tree in center foreground with bulging trunk) growing beside (to right of) an immense white hockory, mockernut hickory, hognut hickory, or white-heart hickory (Carya tomentosa) with readily identifiable soft gray bark and pointed compound leaves. These two "champines" of their respective spceis stood majestically in front of loblolly pine, white oak, laurel oak (Quercus laurifolia) and cherrybark oak (Q. prinus). The backside (side away from the photograph) of this specific southern magnolia was shown in detail in the next photograph.

Lance Rosier Unit, Big Thicket National Preserve, Hardin County, Texas, May. Mesic site. FRES and Kuchler recognitions (lack thereof) were covered in the photo caption before the immediately preceding slide. Variant of SAF 82 (Loblolly Pine-Hardwood). Oak-Pine Series of Brown et al (1998) (but should be for Southeastern Deciduous and Evergreen Forest biotic community). South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 

5. Goosepen in the Big Thicket- The forester's term, goosepen, is "a place hollowed out by fire at the base of a standing tree" (Munns, 1950). This large fire scar (it extended to a height of nearly five feet) was on the backside of the large southern magnolia featured in the immediately preceding photograph. Such fire scars on old trees attest to incidence of surface forest fires in the pineywoods the same as obtains for all other regions of the eastern deciduous forest.

Lance Rosier Unit, Big Thicket National Preserve, Hardin County, Texas, May.

 
6. Climatic climax vegetation type of Big Thicket form of Texas Piney Woods— The beech-magnolia-white oak-loblolly pine forest cover type. This is the ultimate expression, the mesophytic form, of the Big Thicket forest.Magnolia, far left; white oak; center right. Note lush understory of browse plants even under closed forest canopy at climax. Tree species visible include loblolly pine, laurel oak, and swamp chestnut oak (Quercus prinus).Lance Rosier Unit, Big Thicket National Preserve. May, vernal aspect; mesic site. Problems with unit recognition by FRES, Kuchler, and SAF discussed two slides above. South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).
 
7. Southern magnolia (Magnolia grandiflora)- A beautiful flower of the stately southern magnolia against a backdrop of the broad sclerophyllus leaves of this climax pineywoods species. State Tree of Mississippi.
 
Water Oak (Quercus nigra) Forest

The first example of the water oak (Quercus nigra) forest cover type shown immediately below was in a commercial forest in the Big Thicket section of the Texas Pineywoods. This water oak forest vegetation was adjacent to loblolly pine stands and a forest dominated by loblolly pine, water oak, American holly both with a lower woody layer comprised primarily of yaupon or, often called, yaupon holly (Ilex vomitoria).

Water oak has been regarded as Intolerant as to tolerance and as a subclimax species that is quite susceptible to fire damage (Fowells, 1965, p. 630; Burns and Honkala, 1990, Vol. 2, p. 703). Thus while light surface fires tend to maintain pines like the associated loblolly pine, major fire damage as with crown fires would select for regeneration of water oak. In absence of fire plant succession would progress to a climax of hardwoods, which in the Big Thicket would commonly be American beech, southern magnolia, American holly, and climax oaks such as white oak.

 

8. Water oaks in the Pineywoods- Exterior view of a local stand of water oak growing on a flatland forest site that frequently ponded water. Loblolly pine were growing around perimeter of the water oak stand. Yaupon grew as widely scattered individuals while most of the ground layer was oak leaves with scattered plants of longleaf woodoats (Uniola sessifolia), cottongrass bulrush (Scirpus cyperinus), and green flat sedge (Cyperus virens). These species (from this locale) were featured below under the loblolly pine-water oak-American holly form or subtype of loblolly pine-hardwoods forest. The largest--and also the most scarce-- herbaceouss pecies was bentawn plumegrass (Erianthus contortus) which was also featured below.

Liberty County, Texas. February, late hibernal aspect. This is a component or subtype of the general hardwood-pine southern forest forest that has one of the southeastern yellow pines a dominant or, sometimes, an associate species with oaks, hickories, or even beech as the more common climatic dominant (in contrast to a fire-determined dominant). Overall this forest range vegetation would have to be included in FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem) with K-101 (Oak-Hickory-Pine Forest) being the Kuchler equivalent listed thereunder. SAF 88 (Willow Oak-Water Oak-Diamondleaf [Laurel] Oak). Oak-Pine Series of Brown et al (1998) (but should be for Southeastern Deciduous and Evergreen Forest biotic community). South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

Inside the water oaks- Interior of the local stand of water oak presented immediately above. This was a local consociation of Quercus nigra with a "broken" (widely scattered) population of yaupon holly and local herbaceous cover composed variously of longleaf woodoats, cottongrass or woolgrass bulrush, green flat sedge, and panicgrasses (Panicum spp.). This isolated water oak stand was adjacent to a mixed forest of loblolly pine, wter oak, and American holly (covered below).

Liberty County, Texas. February, late hibernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem) with K-101 (Oak-Hickory-Pine Forest) being the Kuchler equivalent listed thereunder. SAF 88 (Willow Oak-Water Oak-Diamondleaf [Laurel] Oak). Oak-Pine Series of Brown et al (1998) (but should be for Southeastern Deciduous and Evergreen Forest biotic community). South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004)..

 

9. One of the more common forms or manifestations of oak forest in the Pineywoods of Texas and Louisiana is the Palmetto-Oak Flats (Ajilvsgi, 1979, ps. 12-13) or, when expressed as to topographic-edaphic rather than botanical features, Clayey Wet Upland Depressions (Diggs et al., 2006, ps. 97-98). Ajilvsgi (1979, p. 12) described overcup oak and laurel oak as dominants whereas Diggs et al., (2006, p. 98) emphasized willow oak and green ash (Fraxinus pennsylvanica) as major plants of the larger tree species. The Society of American Foresters (Eyre, 1980, p. 63) described the willow oak-water oak-diamondleaf or laurel oak type (SRM 88) as developing on a topographic-soil moisture gradient intermediate between the swamp chestnut oak-cherrybark oak type (SRM 91) and the overcup oak-water hickory type (SRM 96) with dominance of SRM 88 tending to change to non-oak hard spceies like green ash under heavy logging or high-grading.

The photographs shown below were of a water oak-willow oak forest with a lower shrub layer made up almost exclusively of dwarf palmetto and a herbaceous layer(s) of sedges, rushes, bulrushes, and panicoid grasses. Views of the Oak-Palmetto Flats in these slides were presented so as to view this forest range vegetation going from exterior to deep interior as if the viewer were traveling to and then into it.

 

10. Coming onto the Oak-Palmetto Flats- Exterior view of an example of the willow oak-water oak-diamondleaf (laurel) oak type showing physiogonomy and overall species composition of this form of Pineywoods. Dominant species of this stand was water oak with willow (locally known as "pin" oak). Laurel oak was a distant third Quercus species. Blackgum or black tupelo (Nyssa sylvatica) was another associate tree species. The largest tree with the horizontal upper limb and fire-scarred basal trunk was an ancient water oak readily idetified by the sporadically scattered, prominent "warts" of bark. Loblolly pine was represented by one conspicuous tree in center midground. There were other infrequent loblolly pine throughout. Young trees grouped at right foreground were a mixture of water and willow oak and very black tupelo. Dwarf palmetto made up a lower shrub layer. Grassses and grasslike plants comprised one or two (rarely three) herbaceous layers in the forest understorey. Herbaceous plants were most common around perimeter of the forest vegetation. Individuals of broomsedge bluestem (Andropogon virginicus) were prominent in foreground understorey.

Hardin County, Texas. February, hibernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem) with K-101 (Oak-Hickory-Pine Forest) being the Kuchler equivalent listed thereunder. SAF 88 (Willow Oak-Water Oak-Diamondleaf [Laurel] Oak). Oak-Pine Series of Brown et al (1998) (but should be for Southeastern Deciduous and Evergreen Forest biotic community). South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 

11. Edge of an Oak-Palmetto Flats forest range- Around perimeter of a stand of water and willow oak with dwarf palmetto were various local assemblages of herbaceous plants. The latter included cottongrass bulrush and miscellaneous sedges, both Carex and Cyperus species (eg. green flat sedge [C. virens]), along with panicgrasses, especially beaked panicgrass (Panicum anceps); paspalums like brownseed paspalum (Paspalum plicatulum), and both broomsedge and bushy bluestem. These latter two species are invaders. These same species also formed herbaceous strata beneath the oaks and pines though with less continuous cover and smaller plants, conditions likely resultant from fairly dense shade. Water and willow oaks are Intolerant species.

Hardin County, Texas. February, hibernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem) with K-101 (Oak-Hickory-Pine Forest) being the Kuchler equivalent listed thereunder. SAF 88 (Willow Oak-Water Oak-Diamondleaf [Laurel] Oak). Oak-Pine Series of Brown et al (1998) (but should be for Southeastern Deciduous and Evergreen Forest biotic community). South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 

12. Into the Pineywoods flats we go- These three photographs were a pictorial "walk to the woods", a sequence of slides showing the range vegetation of a water oak-willow oak- loblolly pine-palmetto-herbaceous plants Pineywoods flats. Continually closer-in views allowed presentation of the herbaceous layer(s) of native vegetation that was better developed at outer edge of the forest stand. Some of the common herbaceous species of this vegetation were presented below in the section devoted to the loblolly pine cover type, specifically the loblolly pine-water oak-American holly form or subtype thereof. The smaller trees in foreground with unshed lower limbs (most of them still alive but senescing) were willow oak. Locals hereabouts apply the otherwise confusing and nonstandardized common name of "pin oak" to Quercus phellos. "Pin" in several oak species refers to any of the lower, usually dead, unshed limbs (ie. dying or dead limbs on species that do self-pruning, but instead become well-seasoned or preserved and, hence, persistent on the lower bole). There were a few scattered woody vines, the only one of which the author-photographer identified was rattan (= Alabama supplejack).

Once inside the Pineywoods flats the interior of the water oak-willow oak-dwarf palmetto-herbaceous range community revealed a "closer-in" view of plant species composition and the lower woody layer of palmetto and the local vertical zone of herbaceous species. Largest trunk was that of a young to mid-age water oak with bark characteristic of an immature tree. At this stage of maturity bark of water oak and willow oak is so similar as to be indistinguishable, thereby making reliance on leaves and buds necessary for definitive indetification. "Warty" bark on older water oak bark was just forming on this straight-trunked specimen, but some smaller water oaks had larger "warts".

Grass shoot (visible in both photographs) in front of this water oak was broomsedge bluestem, a common invader of Oak-Palmetto, which was common and conspicuous throughout this oak flats stand. Almost all herbaceous species were grasses or grass-like plants and, as this was dead of winter and this range had been grazed so that most species had to be identified by vegetative features, most herbs could not be identified by the author who was a "stranger to these parts". The tallest green herb was cottongrass bulrush (shown and described briefly below). There were no prominent forbs in this forest range vegetation. Dwarf palmetto comprised a single-species, lower, woody layer.

Hardin County, Texas. February, hibernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem) with K-101 (Oak-Hickory-Pine Forest) being the Kuchler equivalent listed thereunder. SAF 88 (Willow Oak-Water Oak-Diamondleaf [Laurel] Oak). Oak-Pine Series of Brown et al (1998) (but should be for Southeastern Deciduous and Evergreen Forest biotic community). South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 

13. "Up-and-dicular" perspective of a Oak-Palmetto Flats- Structure and species composition of the water oak-willow oak-dominated Pineywoods flatwoods described under horizontal photographs above. Architecture of this stand was displayed to better advantage in these two photographs. Most hardwood trees were water oak and willow oak of sapling to small pole size. Those with persistent lower limbs were willow oak. There was an "occasional" black tupelo (also of sapling-pole size).

Cover and density of palmetto was shown to good advantage in the first of these two slides while the frequent openings within the palmetto that were populated by grasses and grasslike plants were evident in the second slide. Tree in left foreground with live lower limb was willow oak.

This stand was obviously a second-growth forest. A cohort of sapling to small pole size oaks had developed beneath larger, established (older) but very widely scattered, mature oaks of both species. Structure and, especially, botanical composition of this stand was typical of climax water oak-willow oak-laurel oak-palmetto vegetation. Both willow oak and water oak are classified as Intolerant and recruitment of these species had been possible under a mostly open sky (sparse canopy of oak and loblolly pine). Natural thinning of oaks had already commenced as evidenced by the dead toppled pole (visible in both photographs). This will undoubtedly continue resulting in more dead younger oaks and fewer, though larger, trees (fewer boles but more board foot/acre) and eventually greater oak crown cover (increased--though by no means closed--tree canopy).

The apparent dominant herbaceous species was cottongrass bulrush. Numerous individuals of broomsedge bluestem were conspicuous with their tannish yellow shoots dispersed among bulrush and other grasslike plants.

Hardin County, Texas. February, hibernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem) with K-101 (Oak-Hickory-Pine Forest) being the Kuchler equivalent listed thereunder. SAF 88 (Willow Oak-Water Oak-Diamondleaf [Laurel] Oak). Oak-Pine Series of Brown et al (1998) (but should be for Southeastern Deciduous and Evergreen Forest biotic community). South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 

14. Closing, composite shot of Pineywoods Oak-Palmetto Flats- All-in-one shot of species composition and structure (architeture) the water oak-willow oak-loblolly pine-palmetto-cottongrass bulrush-broomsedge bluestem community featured above. All of these species except loblolly pine, which dominated (generally and/or locally) their respecive layers of vegetation, were visible (if not obvious). In addition, rattan (= Alabamas supplejack) was featured prominently growing up trunks of oaks in left midground. Almost all oak trunks of any age are hosts to various crustose lichen, at least on north and east exposure.

Hardin County, Texas. February, hibernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem) with K-101 (Oak-Hickory-Pine Forest) being the Kuchler equivalent listed thereunder. SAF 88 (Willow Oak-Water Oak-Diamondleaf [Laurel] Oak). Oak-Pine Series of Brown et al (1998) (but should be for Southeastern Deciduous and Evergreen Forest biotic community). South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 
crown hignight
Water oak (Quercus nigra)- Upper trunk and crown of water oak showing leaves and bark of intermediate maturity. Older or most mature bark of water oak often forms wart-like raised areas (basal trunk and stump area). Houston County, Texas. March.
 

15. Dwarf palmetto, blue palmetto, swamp palmetto, dwarf palm, blue palm, etc. (Sabal minor)- Large, mature swamp palmetto with previous season's floral stalk and spent inflorescence. This true palm is most commonly acaulescent (lacking a trunk or bole) though sometimes there are individuals that have a single, short woody stalk which would "pass for" a trunk. The shoot or stem does not branch and is characterized as woody or pithy in nature.

The speciment portrayed here was growing in the water oak-willow oak-lobollly pine-palmetto-cottongrass bulrush-broomsedge stand featured above. Hardin County, Texas, February.

 
Ecotone between Water Oak-Willow Oak Forest and Gulf Coastal Marsh

Another form or subtype of the primarily water oak (with willow oak locally con-dominant) cover type in the Texas-Louisiana Pineywoods develops as a transition zone between the hardwood-pine forest and the Gulf Coast marsh with one or the other of the major range plant communities (forest or marsh) having apparent dominance or predominance as aspect dominance (ie. either widely scattered hardwoods and pine with profusely branching, open crowns growing in a marsh or, alternatively, grasses, sedges, rushes, bulrushes, and other herbaceous marsh species growing as a sparse understorey beneath twater oak, willow oak, laurel oak, overcup oak, blackgum or black tupelo, green ash, and loblolly pine). It seemed to this author that it was less confusing and more consistent to include full coverage of this ecotonal range vegetation at this location rather than with Gulf Coastal marsh which was covered under the chapter, Tallgrass Prairie (Coastal).

This forest range vegetation typically develops as or into a savanna and should in general be interpreted as such. Occasionally, however, there will be local communities of this ecotonal vegetation that appear to be more of forest (at least woodland) physiogonomy. This latter range plant community develops on depressions or ponded local sites. Both expressions of this ecotone are wetlands and were included below.

 

16. Out of the woods and onto the marsh- Exterior view of ecotone of Pineywoods and Gulf Coast marsh. Extreme eastern edge of hardwood-pine forest and beginning of coastal sedge-bulrush-tallgrass freshwater marsh. Feature of ponded water with combination of wet mesophytic and hydrophytic trees and an understorey of grasses and grasslike plants. Trees clearly dominanted the forest- or woodland-phase of this savanna wetland at edge of the Pineywoods forest whereas the predominant marsh-phase or form of this ecotone was in the background (and featured in succeeding slides). Even in this slide that emphasized the tree-dominated form there were scattered individuals of cottongrass bulrush (larger green clumps), numerous species of Carex and Cyperus along with various grasses of genera Panicum, Paspalum, and Andropogon.

Tree species visible in this photograph included water oak, willow oak, blackgum or black tupelo, green ash (Fraxinus pennsylvanica), and loblolly pine.

Hardin County, Texas. February, hibernal aspect. This ecotone or transition zone perhaps should be given its own designation as a distinct potential natural vegetation, but such a classification unit of rangeland or forest vegetation as cover type either by Society for Range Manageament or Society of American Foresters), Forest and Range Ecosystem (USDA Forest Service) or by Brown et al., (1998). There was further--even more--confusion as to most precise desingation of the herbaceous wetland because it had features (species composition, structure, geographic location) of both SRM 711 (Bluestem-Sacahuista Prairie) and SRM 807 (Gulf Coast Fresh Marsh) as if it was a mixture of these two rangeland cover tyhpes. Closest overall vegetational designation with existing classification systems is a combination or "hybrid" of: FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem) with K-101 (Oak-Hickory-Pine Forest) being the Kuchler equivalent listed thereunder, SAF 88 (Willow Oak-Water Oak-Diamondleaf [Laurel] Oak), Mixed hardwood Series (223.13), Southeastern Swamp and Riparian Forest (223.1) of Brown et al (1998, p. 43) and FRES No.41 (Wet Grasslands Ecosystem) with K-70 (Southern Cordgrass Prairie) the Kuchler equivalent thereunder, SRM 711 X 807, Southeastern Interior Marshland (243.1), Warm Temperate Marshland of Brown et al. (1998, p. 45). South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 

17. Interior of the ecotone between a mixed hardwoods flat and freshwater marsh- Inside the woodland- or forest-form or phase of an overall or general savanna formed by the transition between eastern edge of hardwood-pine Pineywoods and Gulf Coastal marsh of sedges, bulrushes, and panicoid grasses. Although the local site shown here has ponded water much of the year it is not inundated for a long enought period to qualify as a swamp. Presence of blackgum or black tupelo, a swamp species, along with a few individuals of overcup oak (Quercus lyrata) attested to extended periods of saturated (= a hydric state) soil. Dominance of this plant community by water oak and willow oak showed this site to be intermediate between poorly drained sites of overcup oak-water hickory forest and better-drained sites dominated by swamp chestnut oak and cherrybark oak (Eyre, 1980, p. 63). Dwarf or swamp palmetto (eg. center midground of first slide) was the main shrub, but individuals of this species were too widely scattered to form a shrub or lower woody layer. Most common and largest herbaceous species in understorey beneath trees on this ponded habitat was cottongrass bulrush (visible as large green tufts and also a component in large dried clumps of herbage). Carex, Cyperus, Panicum, Paspalum, Andropogon (especially A. virginicus, broomsedge bluestem, and A. glomeratus, bushy bluestem), and bentawn plumegrass were present either under crown canopy or adjacent to crown drip line.

Loblolly pine in this wetland vegetation was represented by the largest trunk in the second slide. Tree immediately to right of the loblolly pine was a green ash. Foremost tree (left foreground) was a water oak.

Hardin County, Texas. February, late hibernal aspect. Tree-dominated phase of this savanna that was an ecotone of: FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem) with K-101 (Oak-Hickory-Pine Forest) being the Kuchler equivalent listed thereunder, SAF 88 (Willow Oak-Water Oak-Diamondleaf [Laurel] Oak), Mixed hardwood Series (223.13), Southeastern Swamp and Riparian Forest (223.1) of Brown et al (1998, p. 43) and FRES No.41 (Wet Grasslands Ecosystem) with K-70 (Southern Cordgrass Prairie) the Kuchler equivalent thereunder, SRM 711 X 807, Southeastern Interior Marshland (243.1), Warm Temperate Marshland of Brown et al. (1998, p. 45). South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 

18. Outer perspective of hardwood-pine flats X fresh Gulf Coast marsh ecotone- Two views of the transition zone (and quite a tension zone at that) of a water oak-willow oak-overcup oak-blackgum-green ash-loblolly pine-palmetto community and a cottongrass bulrush-sedge-bluestem-panicgrass-paspalum-cordgrass freshwater coastal marsh. In contrast to the tree-dominated form of this ecotone presented above this showed the more widespread--and more savannah-like-- form of a marsh with scattered trees of the just-listed tree species. The largest trees and with spreading crowns in the first of these two photographs were water oak. Trees in center of second photograph included black tupelo (three trunks together).

Identification of grasslike plants and most grasses was impossible in the existing state of decay and/or shattered fruit. Large individuals of cottongrass bulrush and broomsedge bluestem were exceptions. The Illustrated Flora of East Texas (Diggs et al., 2006) indicated 42 species of sedge (Carex spp.) and 18 species of flatsedge (Cyperus spp.) for the small county of Hardin. It was unquestionable that many of these species, along with species of spikerush (Eleocharis spp.) and bulrush (Scirpus spp.) as well as panicoid grasses such as bushy and broomsedge bluestem and isolated large individuals of sacahuista or Gulf cordgrass (Spartina spartinae), were present on this botanically diverse savannah. Forbs were limited nearly to point of "nonexistence".

Hardin County, Texas. February, late hibernal aspect. This ecotone was a combination of : FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem) with K-101 (Oak-Hickory-Pine Forest) being the Kuchler equivalent listed thereunder, SAF 88 (Willow Oak-Water Oak-Diamondleaf [Laurel] Oak), Mixed hardwood Series (223.13), Southeastern Swamp and Riparian Forest (223.1) of Brown et al (1998, p. 43) and FRES No.41 (Wet Grasslands Ecosystem) with K-70 (Southern Cordgrass Prairie) the Kuchler equivalent thereunder, SRM 711 X 807, Southeastern Interior Marshland (243.1), Warm Temperate Marshland of Brown et al. (1998, p. 45). South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 

)

19. Inside an east Texas transition zone- Interior views of a savannah formed by the ecotone of a wet flatwoods made up of water and willow oak (dominants), with some overcup oak and laurel oak, loblolly pine, green ash, and black tupelo and of freshwater marsh composed of cottongrass bulrush, sedges, flatsedges, spikerushes, panicgrasses, paspalums, bentawn plumegrass, bushy and broomsedge bluestem (beardgrasss), and common cattail.

Most of the trees in the first photograph were water oak; trunks of trees at far right margin of second photograp were overcup oak (Quercus lyrata).Immediately to left of the overcup oak (near center foreground) were shoots of bushy bluestem (closesst to overcup oak) and broomsedge bluestem (to left of the bushy beardgrass). Conspicuous green clumps were mostly cottongrass bulrush.

Hardin County, Texas. February, late hibernal aspect. This ecotone was a combination of : FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem) with K-101 (Oak-Hickory-Pine Forest) being the Kuchler equivalent listed thereunder, SAF 88 (Willow Oak-Water Oak-Diamondleaf [Laurel] Oak), Mixed hardwood Series (223.13), Southeastern Swamp and Riparian Forest (223.1) of Brown et al (1998, p. 43) and FRES No.41 (Wet Grasslands Ecosystem) with K-70 (Southern Cordgrass Prairie) the Kuchler equivalent thereunder, SRM 711 X 807, Southeastern Interior Marshland (243.1), Warm Temperate Marshland of Brown et al. (1998, p. 45). South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 

20. Pool in the Pineywoods X Gulf Coastal marsh ecotone- At spatial scale of local site (in this instance, a larger microhabitat or microsite) a pool in the transition zone between hardwoods-pine flats and freshwater coastal marsh supported an array of aquatic plants from bulrushes and sedges of the Cyperaceae to common cattail (Typha latifolia) of Typhaceae. In the first slide longleaf pondweed (Potamogeton nodosus) was floating on the pool surface. Trees surrounding pool were water and willow oaks.

Hardin County, Texas. February, hibernal aspect. Range vegetation of this locale was described in captions of preceding slides.

 
Loblolly Pine (Pinus taeda) Forest
Loblolly pine is the mainstay of the forest products in the southeastern forest of North America. Loblolly pine (and hybrids thereof) is the single most important species across this general region though, of course, other species including pines are the major lumber/pulp species in portions of the southeastern forest region (eg. slash pine in peninsular Florida). The classic though dated reference for loblolly pine probably is still the monograph by Wahlenberg (1960) with the work of Schultz (1997) a fine successor.
 

22. Trunk of loblolly pine- This is the typical pattern and color of bark on this the largest of the four major pine species in the Southern Pine Region. Appropriately the bark bears the burnished coloration of past cool surface fires. A Virginia creeper or woodbine (Parthenocissus quinquefolia) with newly emerged leaves was climbing the attractive trunk.

Crocket National Forest, Houston County, March.

 

23. Cones of loblolly pine- Relative size, shape, and unique gross features of loblolly pine were presented in these two views of two cones of the dominant pine over much of the southeastern portion of the deciduous forest of North America in cluding the pineywoods of east Texas and western Louisiana. The reproductive (sexual) organs of conifers are borne on a woody or fleshy (berry-like) structure that is designated a strobulus (strobili is the plural). These stroboli are called cones by foresters and most regular folk other than "real" botanists. Conifers produce separate male (staminate) and female (ovulate) cones so that this group of gymnosperms are either diocecious or monecious. Moneciousness is the general arrangement for most genera in Pinaceae (Pinus, Abies, Picea, Tsuga, Pseudotsuga), Cupressaceae (Cupressus, Thuja, Juniperus), and Taxodiaceae (Taxodium, Sequoia, Sequoiadendron)..

Montgomery County, Texas. February (most seed had shattered from the woody ovulatecone).

 

24. Seed in a cone- Two views of a seed in the ovulate cone of loblolly cone. A seed of loblolly pine was shown without a marker in the first slide whereas the base of a fasicle of loblolly pine marked one seed in the second slide slide.The brown, parchment-resembling wing of this single seed (one of a pair) was cut away to more clearly reveal the dry seed. Most other seeds, including the other one of this cone unit, had shattered (been shed) from this cone.

The cone of conifers in the Pinaceae is a compound woody structure comprised of numerous units on which the seed, with its attendant parts, develops and is borne while developing before being shed. Each woody unit of the ovulate cone is is a primary appendage-- a woody bract-- that is called the ovuliferous scale. This woody scale is the ovule/seed-bearing part of the cone (strobolus). Typically a pair of ovules, each of which develops into a dry seed (complete with a winged part for wind dispersal), form on the adaxial (= upper) surface of each woody ovuliferous scale resulting in formation of two seed scars on this upper surface (in the axil where scale joins the central woody axis of the cone.

Montgomery County, Texas. February.

 

25. Core and treasure of the cone- Another view of a seed near apex of cone of loblolly pine. Then two views of a pair of loblolly pine seeds on adaxial surface of ovuliferous scale (ie. in axillary area where woody scale attached to central shaft of the cone). In the first of these two photographs the wing on the left seed of the pair was twisted far to the right for better viewing of the wing, but the wing was in from of (covering up) the right seed. In the second photograph the wing of both seeds of this pair had been removed to more clearly reveal the two seeds.

Montgomery County, Texas. February.

 

26. Future loblolly pines- Unshattered loblolly pine seeds taken from the cones shown above. Some seeds still had their wings attached whereas others were missing these wind-dispersal facilitting organs. Steel measure indicated the size of seed and wings. The two seeds with attached, intact wings were a pair attached on the same woody ovuliferous scale.

Montgomery County, Texas. February.

 

27. Up-close look- Seeds of loblolly pine were shown at closer distance to present details of seed coat and texture of the fragile woody material making up wings. Pines are examples of seed dispersal by wind, anemochory (= aerochory), in which wings facilitate action of wind as an agent or facilitator of sexual reproduction. Wind also operates as facilitator during pollination.

Montgomery County, Texas. February.

 
 
28. Loblolly pine forest— Second (or third) growth, but natural revegetation with an open understory dominated by little bluestem. Associated understory herbs include slender-leaf wood oats (Uniola sessiliflora) plus species ofPaspalum, Panicum, and Sporobolus among grasses plus native legumes like tickclover (Desmodium spp.) and numerous composites. Davy Crockett National Forest, Houston County, Texas. March, vernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem). Variant of K-101 (Oak-Hickory-Pine Forest): the southern pine types have traditionally been interpreted as sub-climax fire-types and this seral stage is maintained by foresters in order to produce the more valuable pine wood products. SAF 81(Loblolly Pine). This type is clearly transitory forest range with total loss of understory as pines approach maturity as is visible in the next scene. South Central Plains- Southern Tertiary Uplands Ecoregion, 35e (Griffith et al., 2004).
 

29. Going into a loblolly pine pine- Stucture and botanical composition of a second-growth loblolly pine forest showing an herbaceous layer dominated by little bluestem followed by longleaf woodoats then beaked panicgrass with two annual panicgrass species sometimes locally functioning as associates, a tall shrub layer represented by flowering dogwood in full-flower, and a lower shrub layer (in this vegetation) of which yaupon holly was the major species. The two annual panicgrasses were warty panicgrass (Panicum verrucosum) and savanna panicgrass (P. gymnocarpon).

Fire-scourched bark attested to use of prescribed or, at least, convenience burning in a Pineywoods oak-pine forest that was maintained primarily as a loblolly pine stand.

Davy Crockett National Forest, Houston County, Texas. March, vernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem). Variant of K-101 (Oak-Hickory-Pine Forest): the southern pine types have traditionally been interpreted as sub-climax fire-types and this seral stage is maintained by foresters in order to produce the more valuable pine wood products. SAF 81 (Loblolly Pine). Oak Pine Series of Brown et al. (1998). This type is clearly transitory forest range with total loss of understory as pines approach maturity as was shown below. South Central Plains- Southern Tertiary Uplands Ecoregion, 35e (Griffith et al., 2004).

 

30.Transitory loblolly pine forest range- Loblolly pine forest range at either: 1) late seral stage with loblolly pine maintained in a hardwood (mostly an oak)-pine forest by frequent burning or 2) a mid-stage (more-or-less) of a wood crop in a thin (sparsely or weakly stocked) stand of loblolly pine. Either way there was low stocking of loblolly pine, the tree crop species, and a well-developed, high-yielding (by loblolly pine range standards) herbaceous understorey for grazing livestock and/or wildlife.

This was the same stand of loblolly pine forest vegetation as introduced in the immediately preceding photograph. Dominant grass in this "photo-plot" of that loblolly pine forest range was little bluestem with longleaf woodoats, beaked panicgrass, savanna panicgrass, and warty panicgrass also present.

Foremost tree (slightly to right of a conspicuous pine trunk) was sweetgum (Liquidambar styraciflua). A young sassafras (Sassafras albidum) with just-beginning-to-open leaves was growing at left margin of photograph. Yaupon of sundry sizes was widespread throughout the woody layers.

Davy Crockett National Forest, Houston County, Texas. March, vernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem). Variant of K-101 (Oak-Hickory-Pine Forest): the southern pine types have traditionally been interpreted as sub-climax fire-types and this seral stage is maintained by foresters in order to produce the more valuable pine wood products. SAF 81 (Loblolly Pine). Oak Pine Series of Brown et al. (1998). This type is clearly transitory forest range with total loss of understory as pines approach maturity as was shown below. South Central Plains- Southern Tertiary Uplands Ecoregion, 35e (Griffith et al., 2004).

 

31. Growing doghair- In the same understorey as presented in the last two preceding photographs and captions there were some very localized (restricted) areas near mature loblolly pine trees on which there were extremely dense patches of pine seedings. Obviously not all of these seedlings could survive, but it was also obvious that these would develop into proverbial "doghair stands" unless something thinned them out. If natural agents of mortality such as fire and disease did not eliminate some of these woefully overstocked little blessings of Mother Nature then Man the Forester would have to intervene in order to achieve efficient management of forest resources. One such "doghair stand" of loblolly pine seedlings was presented in foreground of this photograph.

Various Panicum species (major ones were listed in the preceding caption) were the major grasses on this "photo-plot".

Davy Crockett National Forest, Houston County, Texas. March, vernal aspect. Leaves on hardwood species (such as one in left foreground) were just emerging from buds. FRES No. 13 (Loblolly-Shortleaf Pine Ecosystem). Variant of K-101 (Oak-Hickory-Pine Forest): the southern pine types have traditionally been interpreted as sub-climax fire-types and this seral stage is maintained by foresters in order to produce the more valuable pine wood products. SAF 81 (Loblolly Pine). Oak Pine Series of Brown et al. (1998). This type is clearly transitory forest range with total loss of understory as pines approach maturity as was shown below. South Central Plains- Southern Tertiary Uplands Ecoregion, 35e (Griffith et al., 2004).

 

32. A crop of poles- Closed canopy stand of loblolly pine with no herbaceous (grazable) understorey and lower woody layers limited to Tolerant flowering dogwood and yaupon. As a wood crop this single-species stand of loblolly pine was approaching (within a few years of) maturity. This plantation stand was an example of industrial foresty. On this commercial forest the wood crop was a monoculture of fast-growing, hybrid loblolly pine.

Such loblolly pine plantations are a form of even-aged silviculture (silvicultural system). This crop will be harvested in a few years by clearcutting, "a regeneration or harvest method that removes essentially all trees in a stand" (Helms, 1998). Harvest will result in release of many species of grasses, grasslike plants, forbs, shrubs, and Intolerant tree species like sweetgum. Several of the grass species such as those presented in preceding slides will persist for a number of years and through mid-sere of secondary plant succession. Tree species like sweetgum and numerous oaks and hickories will persist unless eliminated by application of selective herbicides or reduced by commercial livestock grazing and/or prescribed burning. Combinations of these silvicultural treatments may be used (as shown periodically throughout this chapter). This and preceding slides of loblolly pine forest vegetation illustrated transitory forest range that is typical of forest cropping systems on commercial (industrial) forests throughout much of southeastern North America.

Davy Crockett National Forest, Houston County, Texas. March, early vernal aspect (time of the dogwood-redbud tours). This was an anthropogenic variant of the following vegetational units. FRES No. 14 (Oak-Pine Forest Ecosystem). K-101 (Oak-Hickory-Pine Forest). SAF 82 (Loblolly Pine-Hardwood). Biotic community unit of Brown et al. (1998, ps. Oak-Pine Series, 1212.14 of Northeastern Deciduous Forest 122.1 except that there should have been an Oak-Pine Series, say 123.13, os Southeastern Deciduous and Evergree Forest 123.1.South Central Plains- Southern Tertiary Uplands Ecoregion, 35e (Griffith et al., 2004). Another interpretation of this highly human-modified (= non-natural) forest vegetation was FRES No. 13 (Loblolly-Shortleaf Pine Forest Ecosystem). The Kuchler designation would still be K-101 (Oak-Hickory-Pine Forest) while the Society of American Foresters (Eyre, 1980) would be a man-made forest cover type of Loblolly Pine (SAF81).

 

Clarification of terms: the following concepts and definitions were provided from The Dictionary of Forestry developed by the Society of American Foresters (Helms, 1998) to assist students in understanding management and production of grazing and/or browsing resources on transitory forest range.

Silvicultural system- a planned series of treatments for tending, harvesting, and re-establishing a stand.

Regeneration method- a cutting procedure by which a new age class is created.

Even-aged regeneration methods regenerate and maintain a stand with a single age class. One even-aged method is clearcutting which is the cutting of essentially all trees, producing a fully exposed microclimate for the development of a new age class (by either natural or artificial re-eatablishment of the next generation, crop, of trees)

 

33. "Will the real Pineywoods please stand up?"- "You bet, and this is it." In contrast to the loblolly pine plantation introduced in the immediately preceding slide (and several used below to illustrate silvicultural methods) here were two views of the natural oak-hickory-loblolly pine forest vegetation. This was a second-growth forest recovering from the heady days of "cut-and-run" heady logging, but it had the structure (including several layers of vegetation) and species composition of the native mixed hardwood-loblolly pine. Flowering dogwood and lesser cover of redbud hearlded the early days of spring in this sandy land (note road) upland Pineywoods forest. Not exactly a lobolly pine plantation as shown immediately above and farther below. Water oak, accompanied adult and sapling to pole-size loblolly pine. This forest consisted essentially of the species compoisition indicative of the climax vegetation except that following initial frontier, destructive, non-scientific logging; overgrazing (including by free-ranging, mast and root-eating hogs); and underburning (more likely, total fire exclusion) there was only limited herbaceous understorey (mostly of bluestem, panicgrass, and paspalum species along with some sedges and flatsedges)

Davy Crockett National Forest, Houston County, Texas. March, early vernal aspect (time of the dogwood-redbud tours). FRES No. 14 (Oak-Pine Forest Ecosystem). K-101 (Oak-Hickory-Pine Forest). SAF 82 (Loblolly Pine-Hardwood). Biotic community unit of Brown et al. (1998, ps. Oak-Pine Series, 1212.14 of Northeastern Deciduous Forest 122.1 except that there should have been an Oak-Pine Series, say 123.13, os Southeastern Deciduous and Evergree Forest 123.1.South Central Plains- Southern Tertiary Uplands Ecoregion, 35e (Griffith et al., 2004).

 
 
34. Open understory(= permanent forest range) loblolly pine forest- This loblolly forest is growing immediately above the first terrace of the Sabine River. Recurrent fire (note small fire scar on base of first tree on the left) after establishment of loblolly pines maintained an open understory predominately of perennial wiregrass or threeawn species like woolyleaf threeawn (Aristida lanosa), longspike or slimspike threeawn (A. longespica), and purple or arrowfeather threeawn (A. purpurascens) with broomsedge bluestem (Andropogon virginicus) and splitbeard bluestem (A. ternarius) as associates. Pioneer annual composites like giant ragweed (Ambrosia trifida) and horseweed (Conyza canadensis= Erigeron canadensis) are also present, but as last year’s weathered-down stalks. Flowering dogwood (which is at peak bloom in this view) dominates the upper shrub layer with yaupon (green shrub beneath the blooming dogwood) as dominant of the lower shrub layer.
 
 Under the current fire regime this is permaent loblolly pine forest range. It stands in contrast to the transitory loblolly pine forest range where there is denser tree stocking combined with discontinued use of prescribed burning to produce pulp wood instead of pine lumber as in the forest seen here. This range forest cover type persist as a result of the disturbance of repeated fire which kept out hardwood tree species like water and white oaks.The fire disturbance also made favorable habitat for old-field pioneer species such as the two weedy composites and annual threeawns like old-field threeawn (Aristida oligantha plus the similar A. desmantha) and churchmouse threeawn (A. dichotoma). The physiogonomy is that of climax Pineywoods but the absence of hardwood trees and the species composition of the herbaceous understory is clearly that of late seral (= subclimax) forest vegetation. It is a textbook example of “pine woods wiregrass range”. Sabine River, Harrison County, Texas. Vernal aspect, March. FRES No. 13 (Loblolly-Shortleaf Pine Forest Ecosystem), man-modified variant of K-101 (Oak-Hickory-Pine Forest), SAF 81 (Loblolly Pine). Brown et al. (1998) Oak-Pine Series converted into Pine Series by human management. South Central Plains- Tertiary Uplands Ecoregion, 35a (Griffith et al., 2004).
 
35. Climax Loblolly Pine-Hardwood-Pinehill Bluestem Pineywoods Forest- Although not old-growth forest, this is a classic composite Pineywoods community with the species composition of the virgin vegetation. Loblolly pine is the major dominant thereby establishing this as the loblolly pine form of the Pineywoods Complex, but water oak is co-dominant while sweetgum (Liquidambar styraciflua) is well-represented among the trees. The shrub layer is dominated by wax myrtle (Myrica cerifera). The herbaceous understory is remarkably diverse. Scattered small colonies of the rhizomatous decreaser pinehill bluestem (Andropogon divergens) serve as an indicator of what the climax dominant for this site should be. Other grasses include splitbeard bluestem, low or spreading panicgrass (Panicum rhizomatum),  longleaf uniola (Uniola sessiliflora), and Florida paspalum (Paspalum floridanum). Several Carex species are present with considerable cover. The conspicuous graminoid in the immediate foreground is a species of bulrush (Scirpus sp.).  
 
This is a bottomland loblolly pine-hardwood forest on the flood plain of the Sabine River. It is the forest vegetation just below that seen in the previous slide. It is less apt to burn and has a more favorable soil moisture regime than the previous forest range type. Recent and recurrent fire had to have been part of the environment however to maintain this open understory and the fire-adapted grasses. Rather than wiregrass loblolly pine forest range this is the pinehill bluestem-Florida paspalum-low panicum understory. It is produces much higher quality and higher yielding forage. Both the bluestem and wiregrass Pineywoods range types are permanent forest range with a persistent grazable understory.This is climax loblolly pine-oak hardwood forest while the previous plant community was seral loblolly pine forest vegetation. Sabine River bottom, Harrison County, Texas. Vernal aspect, March. FRES No. 13 (Loblolly-Shortleaf Pine Forest Ecosystem), K-101 (Oak-Hickory-Pine Forest), SAF 82 (Loblolly Pine-Hardwood). Anthropogenic Pine Series of Brown et al. (1998). South Central Plains- Tertiary Uplands Ecoregion, 35a (Griffith et al., 2004).
 

36. Big Thicket loblolly pine woods- Exterior view of a loblolly pine-water oak subtype or variant of loblolly pine-hardwood cover type shjowing physiogonomy and botanical composition. At this edge (in a forest opening) young water oak, yaupon holly, and various herbaceous species and the layers they comprise provided an unusual composite "Big Picture" perspective of this forest range vegetation. The small oaks (pole-size) at base of pines were water oak. These young trees had not shed their dead leaves and even had a few persistent live leaves. Yaupon or yaupon holly composed almost all of the lower woody layer except for the regenerting oaks. Grasses were bushy and broomsedge bluestems and bentawn plumegrass.

Liberty County, Texas. February, late hibernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Forest Ecosystem), K-101 (Oak-Hickory-Pine Forest), SAF 82 (Loblolly Pine-Hardwood). Given published biotic communities in the system of Brown et al. (1998) the closest designation would have to be interpreted as the Pine Series (123.12) of Southeastern Deciduous and Evergreen Forest although the Oak-Pine Series (122.14) of Northeastern Deciduous Forest (122.1) is closest in name. There should be a Brown et al. (1998) biotic community of Hardwood-Pine Series under Southeastern Deciduous and Evergreen Forest. South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 

37. Edge of a loblolly pine-water oak forest- Detail of herbaceous and lower woody layers of the forest-clearing edge shown in the immediately preceding slide. Regenerated water oak saplings and yaupon made up a lower woody layer. Bentawn plumegrass and broomsedge bluestem and bushy beardgrass were the major herbaceous species. Pine seedlings bore witness to regeneration of loblolly pine.

Liberty County, Texas. February, late hibernal aspect. Designations of this forest range vegetation were given in the preceding caption.

 

38. Inside with the pines and oaks- Interior of the loblolly pine-water oak forest introduced in the two preceding slides and their captions. American holly (Ilex opaca) was an associate tree species. A few individuals of regenerating American holly and dense yaupon holly made up most of the lower or secondary woody layer. Adequate light on the forest floor at this stage of vegetation development permitted regeneration of pine as well as persistence of an herbaceous understorey consisting of two or three layers. In the interior of this forest community that was more shaded or, same thing, less well-lite than the forest edges shown above, the dominant herbaceous plant was longleaf woodoats (Uniola sessiflora) which "bumped out" the bluestem or beardgrass species and bentawn plumegrass. Other common to locally dominant herbaceous species included cottongrass bulrush, green flatsedge, beaked panicgrass (Panicum anceps), redtop panicgrass (P. rigidulum), and brownseed paspalum (Paspalum plicatluum). These herbaceous species grew together on local habitats (microhabitats at about largest spatial scale) within this loblolly pine-water oak-American holly forest community. Most of these were not visible at scale of these two photographs, but they were featured below at scale of both herbaceous layers and individual plants.

In the first of these two slides water oak and loblolly pine were visible as distinctive trees. The largest tree (left-of-center midground) was water oak. In the second of these photographs water oaks were relegated to midground and surrounded by loblolly pines. Yaupon and small saplings of American holly were widespread in the lower woody layer.

Liberty County, Texas. February, late hibernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Forest Ecosystem), K-101 (Oak-Hickory-Pine Forest), SAF 82 (Loblolly Pine-Hardwood). Given published biotic communities in the system of Brown et al. (1998) the closest designation would have to be interpreted as the Pine Series (123.12) of Southeastern Deciduous and Evergreen Forest although the Oak-Pine Series (122.14) of Northeastern Deciduous Forest (122.1) is closest in name. There should be a Brown et al. (1998) biotic community of Hardwood-Pine Series under Southeastern Deciduous and Evergreen Forest. South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 

39. Up close in the interior- Interior structure and species composition of a Big Thicket Pineywoods second-growth forest dominated by trees of loblolly pine, water oak, and American holly. Yaupon and small saplings of American holly made up bulk of lower woody layer(s). There was no reproduction of loblolly pine in the denser locale of the forest. Neither was there presence of herbaceous species.

Foremost trunk (left foreground) and four pole-size trunks were loblolly pine. Largest tree with straight bole (left midground) was water oak as were the two small saplings still with green leaves growing between the foremost loblolly pine and the large water oak.

Liberty County, Texas. February, late hibernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Forest Ecosystem), K-101 (Oak-Hickory-Pine Forest), SAF 82 (Loblolly Pine-Hardwood). Given published biotic communities in the system of Brown et al. (1998) the closest designation would have to be interpreted as the Pine Series (123.12) of Southeastern Deciduous and Evergreen Forest although the Oak-Pine Series (122.14) of Northeastern Deciduous Forest (122.1) is closest in name. There should be a Brown et al. (1998) biotic community of Hardwood-Pine Series under Southeastern Deciduous and Evergreen Forest. South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 
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40. Loblolly pine-water oak-American holly subtype of Big Thicket Pineywoods- All-in-one shot of an example of this variant of a loblolly pine-hardwood forest cover type with yaupon and regenerating American holly comprising a lower woody layer and a local opening with longleaf woodoats and other herbaceous species. There was also much reproduction of water oak with numerous small saplings that had retained many of their leaves throughout the usually mild winter of the Big Thicket. Longleaf woodoats and local stands of other herbaceous species were also present though widely scattered.

All of the larger trees in midground were water oak except for one loblolly pine. This was an example that the climatic climax of these forest type is oak and not pine. Both cover types of Loblolly Pine (SAF 81) and Loblolly Pine-Hardwood (SAF 82) (Eyre, 1980) are fire types (ie. only under conditions where fire overrides other components of climate) does this forest vegetation have loblolly pine as a dominant or co-dominant species into climax stage.

Liberty County, Texas. February, late hibernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Forest Ecosystem), K-101 (Oak-Hickory-Pine Forest), SAF 82 (Loblolly Pine-Hardwood). Given published biotic communities in the system of Brown et al. (1998) the closest designation would have to be interpreted as the Pine Series (123.12) of Southeastern Deciduous and Evergreen Forest although the Oak-Pine Series (122.14) of Northeastern Deciduous Forest (122.1) is closest in name. There should be a Brown et al. (1998) biotic community of Hardwood-Pine Series under Southeastern Deciduous and Evergreen Forest. South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 
41. Longleaf woodoats (Uniola sessiflora)- Five plants of longleaf woodoats adorned the floor of a loblolly pine-water oak-American holly variant of the Loblolly Pine-Hardwood forest cover type (SAF 82). Liberty County, Texas. February.
 

42. In a small clearing- A small clearing provided adequate light for local stands of herbaceous vegetation, woody layers made up of yaupon and regenerated water oak. At edge of clearing the woody shoot of rattan or Alabama supplejack was climbing a young loblolly pine (small pole in right midground).

Species composition of the herbaceous layers was presented in the next slide.

Liberty County, Texas. February, late hibernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Forest Ecosystem), K-101 (Oak-Hickory-Pine Forest), SAF 82 (Loblolly Pine-Hardwood). Given published biotic communities in the system of Brown et al. (1998) the closest designation would have to be interpreted as the Pine Series (123.12) of Southeastern Deciduous and Evergreen Forest although the Oak-Pine Series (122.14) of Northeastern Deciduous Forest (122.1) is closest in name. There should be a Brown et al. (1998) biotic community of Hardwood-Pine Series under Southeastern Deciduous and Evergreen Forest. South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 

43. Something to graze- Two views of a local stand of herbaceous species in the understorey of the Pineywoods loblolly pine-water oak-American holly flatwoods forest shown and described immediately above. Largest and most common species was cottongrass bulrush followed by green flatsedge, redtop panicgrass, and longleaf woodoats. The latter species more commonly grows by itself as shown above, but it frequently grows in association with other grasses and grasslike plants.

Individual plants of the cottongrass bulrush and green flatsedge introduced in these two photographs were shown in more detail in the succeeding four slides.

Liberty County, Texas. February, late hibernal aspect.

 

44. Cottongrass bulrush, wooly-grass bulrush, or wool-grass (Scirpus cyperinus)- This was one of the most common and largest species of grasslike plants in much of the wetter environments of the loblolly pine-hardwood forest cover type in the Big Thicket area of east Texas. Cottongrass bulrush was especially common (and locally dominant) on mesic to wet forest and range sites such as those for loblolly pine and the various forms of "oak flats" or "flatwoods".

The individual plant presented in this and the two slides above the next caption was one of several specimens growing on the loblolly pine-water oak-American holly forest community featured above

Liberty County, Texas. February.

 

45. Inflorescence of cottongrass bulrush- Two panicles on the same individual plant of cottongrass bulrush introduced in the immediately preceding photograph (one of several such bulrush plants shown in the two photographs preceding that last slide).

More recent taxonomic treatments of the Scirpus species such as that by Diggs et al. (2006) have rearranged many of these once-upon-a-time Scirpus members into such genera as Schoenoplectus, Bolboschoenus, Isolepis, and even Eleocharis! Interestingly, in this bulrush basket upset cottongrass bulrush remained as Scirpus cyperinus (ie. still a true bulrush as it were).

Liberty County, Texas. February, late hibernal aspect.

 
46. Weathered flat- A highly weathered panicle of green flatsedge (Cyperus virens) in the local stand of herbaceous vegetation in the Pineywoods loblolly pine-water oak-American holly flatwoods forest described herein. In the Illustrated Flora of East Texas Diggs et al. (2006) showed and mapped 19 species of flatsedge as occurring in the small Texas county of Liberty. Green flatsedge is one of the more common Cyperus species growing within the Big Thicket of the Texas Pineywoods. Liberty County, Texas. February.
 

47. Plumes in the pines- Panicles of bentawn plumegrass (Erianthus contortus) growing on the loblolly pine-water oak-American holly flatwoods forest featured here. The Illustrated Flora of East Texas (Diggs et al., 2006) put Erianthus in with an expanded sugarcane genus (Saccharum spp.) and renamed bentawn plumegrass S. brevibarbe var. contortum. Diggs et al. (2006) listed and mapped four former Erianthus species as being in the Pineywoods, including Liberty County, Texas (county where these photographs were taken). Correll and Johnston (1979) in Manual of the Vascular Plant of Texas, still the statewide "bible" of plant taxa, listed three Erianthus species for this "neck of the woods".

Erianthus species are some of the largest grasses native to the Pineywoods. E. contortus is probably the most common of these. Liberty County, Texas. February, hard-grain/shatter stage of phenology.

 

48. Beauty in the little things- Closeups of spikelets in the panicles of bentawn plumegrass shown immediately above. Liberty county, Texas. February, hard grains were shattering rapidly (lucky photographer preserved this lively scene for generations of grassmen).
 

49. Holly in the stand- Deeper inside the loblolly pine-water oak-American holly stand of flatwoods featured herein (and shown repeatedly above) American holly was becoming the local dominant tree species. Shrub-sized woody plants with persistent green leaves (foreground understorey) included young yaupon, water oak saplings, and American holly saplings and seedlings. Whereas tolerance rating for loblolly pine is Intolerant (Fowells, 1965, p. 366; Wenger, 1984; Burns and Honkala, 1990, Vol 1, p. 505) and water oak is Intolerant (Fowells, 1965, p. 630; Burns and Honkala, 1990, Vol. 2, p. 703) , American holly is Very Tolerant which is the same as American beech, sugar maple, and flowering dogwood (Wenger, 1984).

In absence of fire, windthrow, logging, and other disturbances (natural or anthropogenic) American holly (or other Very Tolerant species in the Big Thicket like American beech and southern magnolia) eventually become dominant as development of forest vegetation reaches climax. That phenomenon was shown in this photograph where the only seedlings present were those of American holly.

The largest and foremost trunk (right foreground; smooth bark) was a nice, shaply specimen of American holly. This specific plant was used below to describe its species, including another view of this same bole. The medium-sized liana growing up the American holly was some species of grape (Vitis sp.).

Liberty County, Texas. February, late hibernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Forest Ecosystem), K-101 (Oak-Hickory-Pine Forest), SAF 82 (Loblolly Pine-Hardwood). Given published biotic communities in the system of Brown et al. (1998) the closest designation would have to be interpreted as the Pine Series (123.12) of Southeastern Deciduous and Evergreen Forest although the Oak-Pine Series (122.14) of Northeastern Deciduous Forest (122.1) is closest in name. There should be a Brown et al. (1998) biotic community of Hardwood-Pine Series under Southeastern Deciduous and Evergreen Forest. South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 

50. "Hollyer" Pineywoods- On one local part of the loblolly pine-water oak-American holly dominated stand shown and described above, American holly was becoming the climax dominant tree species. Saplings of American holly were more common than those of water oak and the only seedlings were those of American holly. There were no saplings (only pole-size trees) of loblolly pine, the tree which clearly dominated the canopy (with water oak as the local associate species) at this subclimax stage. Yaupon, the overall community dominant of a lower woody layer, was common and shared this layer with saplings of water oak and both saplings and seedlings of American holly as was just remarked.

The adult American holly was the same individual whose trunk (with grape vine) was featured in the slide immediately above.

Liberty County, Texas. February, late hibernal aspect. FRES No. 13 (Loblolly-Shortleaf Pine Forest Ecosystem), K-101 (Oak-Hickory-Pine Forest), SAF 82 (Loblolly Pine-Hardwood). Given published biotic communities in the system of Brown et al. (1998) the closest designation would have to be interpreted as the Pine Series (123.12) of Southeastern Deciduous and Evergreen Forest although the Oak-Pine Series (122.14) of Northeastern Deciduous Forest (122.1) is closest in name. There should be a Brown et al. (1998) biotic community of Hardwood-Pine Series under Southeastern Deciduous and Evergreen Forest. South Central Plains- Flatwoods Ecoregion, 35f (Griffith et al., 2004).

 

51. Happy holly happenings- Regeneration (from seed) of American holly on floor of a subclimax loblolly pine-water oak forest. A young sapling of American holly represented the future generation of the climax dominant of this Pineywoods forest range. Yaupon holly, an individual of which was behind the featured holly sapling, was the overall dominant of a lower woody layer. American holly, a Very Tolerant tree species, had successfully reproduced even with this competition. The only herbaceous species was longleaf woodoats.

Another photograph of a small American holly sapling was presented below to show details of holly leaves.

The was the same stand of loblolly pine-water oak-American holly-yaupon-longleaf woodoats-bulrush-flatsedge Big Thicket flatwoods forest as featured above. Liberty County, Texas. February, late hibernal aspect.

 

52. Dynasty in the making- This large, symetrical American holly and its progeny (ranging from seedlings to small saplings) were the climax tree species and future dominant of a loblolly pin-water oak-American holly-yaupon holly- longleaf woodoats-bulrush forest range community. American holly is regarded as Very Tolerant (Wenger, 1984) so that in absence of disturbances (eg. repeated forest fires, forest harvests) the Intolerant loblolly pine (Fowells, 1965, p. 366; Wenger, 1984; Burns and Honkala, 1990, Vol 1, p. 505) and Intolerant water oak (Fowells, 1965, p. 630; Burns and Honkala, 1990, Vol. 2, p. 703) will be succeeded by American holly. Successful regeneration of holly and absence of reproduction bf loblolly pine was shown in these two photographs. Numerous young plants of yaupon were also present.

Besides showing regeneration of American holly, these two slides provided views of a mature American holly showing crown shape and branching pattern typical of this climax hardwood (angiosperm) species.