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Name
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Reference
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Description |
Comm #10981
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CEGL005063
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accession code: VB.CC.6433.CEGL005063
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #10982
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Panicum virgatum - Tripsacum dactyloides - (Panicum hemitomon) Herbaceous Vegetation
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accession code: VB.CC.35847.CEGL007937
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Southeastern Ecology Working Gro... |
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This association describes wet coastal prairie, now virtually extirpated, that historically was found in a natural mosaic with upland, mesic (non-wetland) coastal prairie to form the once extensive coastal prairies of the Pleistocene Prairie Terraces of southwestern Louisiana and southeastern Texas. This type occupied the broad low flats, drainage swales (locally called "coulees" in Louisiana), and small shallow seasonally flooded areas (often called "marais" and "platins") that interdigitated with the slightly higher broad, convex flats of upland coastal prairie. It also occupied low, wet areas between pimple mounds, the mounds supporting upland coastal prairie. This landscape was bisected by "gallery forests" along small permanent streams that divided the prairie into "coves." The prairies unquestionably sustained a rich variety of wetland grasses, sedges, rushes and forbs. Extremely few examples of wet coastal prairie remain, and practically no historical literature records of the vegetation were made. Further estimations of the characteristic vegetation of this type, primarily in relation to Louisiana examples, have been developed from a review of heliophytic herbaceous wetland vegetation thought to be native to the region, combined with the few floristic studies made of remnant native "prairie" patches in the area (e.g., Allen 1988, LNHP on-going surveys, Brazoria National Wildlife Refuge). Grasses and grass-like plants (graminoids) most likely dominated. It must be noted that the coastal prairie vegetation of this type in Louisiana is very much like that of the adjacent longleaf pine flatwood savannas. The coastal prairie grades gradually on its northern edge into the longleaf pine flatwoods section in Louisiana, the two types sharing most herbaceous species in common in the transitional area. The soils of wet coastal prairie are hydric, strongly acidic to slightly alkaline, and are mainly silt loams and silty clay loams. The coastal prairie zone of southwestern Louisiana and southeastern Texas has become very seriously infested with <i>Triadica sebifera (= Sapium sebiferum)</i> (Chinese tallow tree), which in many places has formed dense thickets and forests. It will quickly dominate fallow pastures and fields. Historically, upland coastal prairie was maintained by frequent burning and soil conditions generally inhospitable to the growth of trees and shrubs. |
Comm #10983
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CEGL000573
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accession code: VB.CC.3182.CEGL000573
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #10984
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CEGL005059
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accession code: VB.CC.6432.CEGL005059
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #10985
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Pinus taeda - (Quercus spp.) / Ostrya virginiana - Sabal minor Forest
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accession code: VB.CC.34965.CEGL007955
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Southeastern Ecology Working Gro... |
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This <i>Pinus taeda</i>-dominated forest occurs in the southwestern extremity of the Upper West Gulf Coastal Plain of Texas and may occur elsewhere in the region. The most characteristic feature of this community is the strong dominance of <i>Sabal minor</i>. The overstory is dominated by <i>Pinus taeda</i>, followed closely by <i>Quercus nigra, Ostrya virginiana</i>, and <i>Liquidambar styraciflua</i>. <i>Ostrya virginiana</i> and <i>Fraxinus americana</i> are the most important midstory species. The understory is strongly dominated by <i>Sabal minor</i> with patches of sedges (<i>Carex</i> spp.) and other herbaceous species infrequently scattered throughout. Many of the plant species present are believed to indicate a rich nutrient and/or pH status in the region. |
Comm #10986
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Cercocarpus ledifolius / Festuca idahoensis Woodland
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accession code: VB.CC.23356.CERCOCARPUSLEDI
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Western Ecology Working Group of... |
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In Montana this type has been documented from the Beaverhead Mountains Section, where it occurs on moderate to steep, rocky and north-facing slopes of varying parent materials; elevations range upward from 5900 feet to at least 9000 feet. It occurs on comparable settings in the Challis Volcanics and Idaho Batholith sections of central Idaho. In Montana this association has been sampled on steep cool slopes comprised of granitic and metamorphic (schist) colluvium which weathers to shallow, poorly developed and excessively drained soils. It has been noted on sedimentary (quartzite and limestones) substrates as well and thus parent material is thought not to be a controlling factor. Cercocarpus ledifolius is dominant, growing as a small tree, ranging in height from 6-12 feet, depending in part on site quality and intensity of past browsing; Cercocarpus ledifolius cover also ranges widely (10-30% plus). Numerous other shrubs are present, including Artemisia tridentata ssp. vaseyana, Artemisia frigida, Ericameria nauseosa (= Chrysothamnus nauseosus), Chrysothamnus viscidiflorus, and Eriogonum microthecum, though their combined canopy cover does not exceed 5-10%. The herbaceous layer is usually sparse, with the combined canopy cover not exceeding 30%, of which most is xeric-adapted, cool-season grasses such as Pseudoroegneria spicata, Achnatherum hymenoides (= Oryzopsis hymenoides), Hesperostipa comata (= Stipa comata), and Poa secunda (= Poa sandbergii), any one of which may occur with higher canopy cover than the indicator species for the type, Festuca idahoensis (which needs to be 'well-represented,' >5% canopy cover for type recognition). The ground surface is characterized by exposed soil, gravel and cobbles generally in excess of 70% cover, but in contrast to Cercocarpus ledifolius / Pseudoroegneria spicata of southerly exposures, these northerly exposures favor the development of an intermittent mat of mosses and lichens. |
Comm #10987
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Quercus muehlenbergii - Quercus sinuata / Rhus aromatica / Liatris aspera - Allium canadense var. mobilense - Schizachyrium scoparium Woodland
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accession code: VB.CC.35424.CEGL007968
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Southeastern Ecology Working Gro... |
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This dry calcareous woodland community occurs on ridgetops and knobs within a blackland prairie matrix in the Upper West Gulf Coastal Plain of Arkansas. Overstory trees are short (to 20 feet), gnarly, and widely spaced. In a fire-maintained condition, the overstory is open and the understory consists of prairie vegetation typical of the surrounding matrix. The herbaceous layer is predominately forb and grass in composition and moderately dense. Bare soil may be present and is covered with <i>Nostoc commune</i>. The dominant tree species in the sparse overstory is overwhelmingly <i>Quercus muehlenbergii</i> to the northeast and <i>Quercus sinuata</i> to the southwest. Other overstory trees may include <i>Carya myristiciformis, Cercis canadensis, Fraxinus americana, Quercus shumardii, Ulmus crassifolia</i>, and <i>Ulmus alata</i>. <i>Juniperus virginiana</i> and <i>Juniperus ashei</i> (to the west) become prominent with fire suppression. <i>Rhus aromatica</i> is often a dominant woody shrub. Other shrubs may be present, including <i>Cornus drummondii, Diospyros virginiana, Frangula caroliniana, Ilex decidua, Juniperus virginiana, Rosa carolina, Sideroxylon lanuginosum, Symphoricarpos orbiculatus</i>, and <i>Viburnum rufidulum</i>. Woody vines include <i>Berchemia scandens, Parthenocissus quinquefolia, Smilax rotundifolia</i>, and <i>Toxicodendron radicans</i> but are not particularly important to the structure of the community. The herbaceous layer is dominated by forbs and grasses (sedges). Dominant herbaceous species include <i>Allium canadense var. mobilense, Bouteloua curtipendula, Carex cherokeensis</i> (in fire-suppressed state), <i>Echinacea purpurea, Helianthus hirsutus, Liatris aspera</i>, and <i>Schizachyrium scoparium</i>. |
Comm #10988
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(Quercus incana) / Schizachyrium scoparium - Bouteloua hirsuta - Dalea villosa var. grisea - Selaginella arenicola ssp. riddellii Xeric Sand Barrens Woodland
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accession code: VB.CC.35950.CEGL007973
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Southeastern Ecology Working Gro... |
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This xeric herbaceous plant community occurs on hilltops and slopes over deep sands on the Upper West Gulf Coastal Plain of Arkansas. Overstory trees are few or nonexistent apparently due to either extreme edaphic conditions and/or extremely frequent fire histories. The herbaceous layer is thick and relatively short (2-3 feet tall). Bare soil is usually present, although often covered with <i>Selaginella arenicola ssp. riddellii</i> and <i>Nostoc commune</i>. The only overstory trees are scattered, dwarfed, frequently multi-stemmed (due to drought induced die-back) <i>Quercus incana</i>. Shrubs and woody vines are infrequent with scattered <i>Ceanothus americanus, Toxicodendron radicans</i>, and <i>Vitis aestivalis</i>. The herbaceous layer is dominated by grasses such as <i>Aristida lanosa, Bouteloua hirsuta, Paspalum setaceum</i>, and <i>Schizachyrium scoparium</i>. |
Comm #10989
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Osmunda regalis - Osmunda cinnamomea - Eupatorium perfoliatum - Utricularia sp. Herbaceous Vegetation
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accession code: VB.CC.35852.CEGL007974
NOT CURRENTLY ACCEPTED
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Southeastern Ecology Working Gro... |
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This community is an herbaceous sandhill seep of the Upper West Gulf Coastal Plain. <i>Osmunda regalis var. spectabilis</i> and <i>Osmunda cinnamomea</i> dominate, with other forbs such as <i>Eupatorium perfoliatum</i> and <i>Utricularia</i> sp. This association is found at the Miller County Sandhills Natural Area, Arkansas. More information is needed. |
Comm #10990
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Diospyros sandwicensis Lowland Mesic Forest
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accession code: VB.CC.33995.CEGL008028
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Western Ecology Working Group of... |
0
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