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Name
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Reference
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Plots↓
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Description |
Comm #12811
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Juniperus occidentalis / Artemisia arbuscula / Pseudoroegneria spicata Wooded Herbaceous Vegetation
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accession code: VB.CC.24450.JUNIPERUSOCCIDE
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Western Ecology Working Group of... |
0
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Comm #12812
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Hudsonia tomentosa Dune Dwarf-shrubland
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accession code: VB.CC.36621.CEGL004024
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Midwestern Ecology Working Group... |
0
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This dwarf-shrubland is found in the Great Lakes region of the United States. Stands occur on gently to moderately sloping dunes (dune-swale complex) and sandplains with rapidly drained sand soil. This unique community likely occurs because of the protection by the dunes from north winds and the slightly elevated location on low to midslopes. The slight slope and protection from the wind limit erosion and allow a stable surface for vegetation (versus the shifting sands of the higher dunes). This community is dominated by <i>Hudsonia tomentosa</i>, which can often occur in monotypic stands. A very sparse taller shrub layer with species such as <i>Pinus banksiana, Populus balsamifera</i>, and <i>Salix interior</i> may be present. The sparse herbaceous layer includes <i>Ammophila breviligulata, Deschampsia flexuosa</i>, and <i>Maianthemum stellatum</i>. |
Comm #12813
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CEGL001381
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accession code: VB.CC.3965.CEGL001381
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #12814
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CEGL001382
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accession code: VB.CC.3966.CEGL001382
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Comm #12815
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A.144
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accession code: VB.CC.1216.A144
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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Stands of this alliance are forests with dense to open canopies dominated by ~Tsuga caroliniana$. Trees may be wind-shorn, gnarled and twisted in exposed situations. Occurrences in gorges sometimes have a substantial admixture of ~Tsuga canadensis$. Other associated species may include ~Quercus prinus, Quercus rubra, Pinus rigida, Pinus virginiana$, and ~Pinus pungens$. The shrub stratum is dense and dominated by ericaceous species, such as ~Rhododendron maximum, Rhododendron catawbiense, Rhododendron carolinianum, Kalmia latifolia, Gaylussacia$ spp., and ~Vaccinium$ spp. The herbaceous stratum is sparse, with typical species including ~Gaultheria procumbens, Mitchella repens, Chimaphila maculata, Galax urceolata$, and ~Xerophyllum asphodeloides$. Lichens, including ~Cladina rangiferina$ and ~Cladina subtenuis$, can be abundant. Forests in this alliance occur mostly on cliffs, rocky slopes and ridges, and less commonly on more gentle slopes and flat areas in valleys. Soils are usually nutrient-poor and rocky, with much exposed rock surface. Occurrences of these forests tend to be small and have distinct boundaries. ~Tsuga caroliniana$ is an Appalachian endemic with a very limited range, scattered in the Southern Blue Ridge and occasional in the Piedmont and Ridge and Valley. |
Comm #12816
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Schizachyrium scoparium - Sorghastrum nutans - Andropogon gerardii - Bifora americana Vertisol Herbaceous Vegetation
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accession code: VB.CC.35147.CEGL004027
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Southeastern Ecology Working Gro... |
0
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This tallgrass prairie community occurs on Vertisols in the southern and central portions of the Blackland Prairie and in the Fayette Prairie regions of Texas. In the northern Blackland Prairie region this type dominates areas where gilgai are poorly developed, as well as occurring in microhighs of gilgai microtopography in close association with ~<i>Tripsacum dactyloides - Panicum virgatum - Sorghastrum nutans - Helianthus maximiliani</i> Herbaceous Vegetation (CEGL002217)$$. Secondary grass species include <i>Nassella leucotricha, Bouteloua curtipendula, Elymus canadensis</i>, and <i>Koeleria macrantha (= Koeleria pyramidata)</i>. Associated forbs and legumes include <i>Silphium radula, Helianthus maximiliani, Hedyotis nigricans, Symphyotrichum ericoides (= Aster ericoides), Phlox pilosa, Callirhoe alcaeoides, Castilleja purpurea, Salvia azurea, Eryngium yuccifolium, Liatris mucronata, Dalea multiflora, Dalea tenuis, Astragalus crassicarpus</i>, and <i>Mimosa roemeriana (= Schrankia roemeriana)</i>. |
Comm #12817
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(Crataegus opaca) / Schizachyrium scoparium - Panicum virgatum - Croton capitatus Seasonally Flooded Herbaceous Vegetation
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accession code: VB.CC.36381.CEGL003974
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Southeastern Ecology Working Gro... |
0
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This seasonally flooded grassland occurs only in extreme southern Arkansas and northern Louisiana in the bottoms along the Ouachita River on the Upper West Gulf Coastal Plain. Ecologically, the sand prairie community structure and composition are edaphically controlled, forming only on the Haggerty soil series. The prairie flora is maintained by xero-hydric conditions, droughty, low water-holding capacity soils combined with deep winter flooding, and a high level of exchangeable aluminum which can be toxic to many plants. The herbaceous vegetation is typically short (2-3 feet), sparse to dense, with bare soil present in some areas. This community can become shrubby, perhaps due to fire suppression, and woody species can encroach upon the prairie. Dominant herbaceous species include <i>Schizachyrium scoparium, Diodia teres, Croton capitatus</i>, and <i>Panicum virgatum</i>. Woody species are found around the edges of the prairie and sporadically distributed through the interior. They are seldom over 10 feet tall and are frequently multi-stemmed. Woody species may include <i>Cephalanthus occidentalis, Cornus foemina (= ssp. foemina), Crataegus opaca, Crataegus viridis, Diospyros virginiana, Gleditsia triacanthos, Hibiscus moscheutos ssp. lasiocarpos (= Hibiscus lasiocarpos), Ilex decidua, Liquidambar styraciflua, Styrax americanus, Vaccinium arboreum</i>, and <i>Vaccinium fuscatum</i>. The prairies are surrounded by mature bottomland hardwood forests dominated by <i>Quercus phellos</i> and <i>Quercus nigra</i>, as well as <i>Quercus lyrata</i>-dominated flatwoods and sloughs, with large <i>Pinus taeda</i> on slightly higher topographic positions. The prairie openings are situated in Quaternary Period, Pleistocene Epoch Lacustrine deposits (e.g., beaches and sand bars of relict lakes). The Haggerty soil series is a nearly level, frequently flooded, somewhat poorly drained, low fertility soil with high levels of exchangeable aluminum. These sandy loams are neutral at the surface and medium acidic at the subsurface. A seasonably high water table fluctuates between the surface and a depth of 1.5 feet. During inundation the prairies are used as spawning grounds by fish from the Ouachita River. The type location is in Ashley County, Arkansas. A high-quality example of this community type is known at Coffee Prairie Natural Area. |
Comm #12818
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Abies concolor - Pinus ponderosa / Cercocarpus ledifolius Forest
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accession code: VB.CC.20646.ABIESCONCOLORPI
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Western Ecology Working Group of... |
0
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Comm #12819
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Piedmont Acidic Cliff Sparse Vegetation
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accession code: VB.CC.35728.CEGL003979
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Southeastern Ecology Working Gro... |
0
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This sparsely vegetated cliff association occurs in the Piedmont of the southeastern United States. Examples are found on steep to vertical outcrops of acidic substrates, in topographically low settings such as river bluffs that are not subject to flood scouring. Substrates may include various felsic igneous or metamorphic rocks, acidic saprolite, and occasionally unconsolidated acidic sediments. Vegetation is low in cover, and is confined to lichens and plants growing on bare rock and to sparse herbs, shrubs, and trees rooted in local pockets of deeper soil. The flora is a mix that usually includes drought-tolerant, shade-intolerant species, species shared with surrounding forests, and sometimes local occurrences of wetland species associated with small seepage zones. Most of the species are acid-tolerant, and more basophilic species are largely absent. Lichens and bryophytes may be abundant or scarce. |
Comm #12820
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CEGL001081
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accession code: VB.CC.3680.CEGL001081
NOT CURRENTLY ACCEPTED
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EcoArt 2002 |
0
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