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Add/Drop	Name	Reference	Plots↓	Description
Comm #611	(Quercus palustris) / Panicum rigidulum var. rigidulum - Panicum verrucosum - Eleocharis acicularis Marsh » more details accession code: urn:lsid:vegbank.org:commConcept:36043-{379E5BF5-EC63-4168-91B4-B15C5A7F2BDA}	NatureServe Biotics 2019	32	This community occurs in seasonally flooded depression ponds developed by solution and collapse of carbonate rocks underlying acidic colluvial materials deposited on the eastern edge of the Great Valley of Virginia, in Augusta, Rockingham, and southern Page counties, Virginia. This community has a variable physiognomy, from an open woodland with scattered individuals or groves of <i>Quercus palustris</i>, to entirely herbaceous with a marginal zone of trees. <i>Quercus palustris</i> is the most common and characteristic tree species; other trees include <i>Acer rubrum, Nyssa sylvatica, Pinus rigida</i>, and <i>Diospyros virginiana</i>. The shrub (and woody vine) stratum is usually sparse or absent; it can include <i>Vaccinium corymbosum, Vaccinium fuscatum, Cephalanthus occidentalis</i>, and <i>Smilax rotundifolia</i>. The herb stratum is well-developed. Herbaceous species with high constancy include <i>Panicum rigidulum var. rigidulum, Panicum verrucosum, Eleocharis acicularis, Agrostis perennans, Dichanthelium acuminatum, Hypericum boreale, Helenium virginicum</i> (endemic to this and related communities in Virginia and Missouri), <i>Panicum philadelphicum, Bidens frondosa, Viola lanceolata, Erechtites hieraciifolius, Symphyotrichum dumosum, Fimbristylis autumnalis, Rhexia mariana</i>, and <i>Rhexia virginica</i>.
Comm #612	Trifolium variegatum – Vulpia bromoides – (Hypochaeris glabra – Leontodon taraxacoides) Association » more details accession code: urn:lsid:vegtwig.vegbank.org:commconcept:266-{D9E55141-295F-4D34-977B-2315AABCA63C}	Klein et al. 2007	32	42.005.04
Comm #613	Atriplex obovata Shrubland Alliance » more details accession code: VB.cc.29881.ATRIPLEXOBOVATA	NVC 2004	31
Comm #614	Panhandle Xeric Sandhills » more details accession code: urn:lsid:cvs.bio.unc.edu:commConcept:28573-{713AB0BE-C6CB-4C7C-A437-BAF4687AB65D} NOT CURRENTLY ACCEPTED	S. Carr PhD	31
Comm #615	Nolina microcarpa Shrubland Alliance » more details accession code: VB.cc.30489.NOLINAMICROCARP	NVC 2004	31
Comm #616	SPARSELY VEGETATED SUB-DESERT SHRUBS** » more details accession code: VB.cc.30277.SPARSELYVEGETAT	NVC 2004	31
Comm #617	Ceanothus megacarpus - Adenostoma fasciculatum Shrubland » more details accession code: VB.CC.37446.CEGL003565		31	This shrubland association occurs on somewhat steep to steep slopes of variable aspect at low elevations between 0 and 688 m. It is characterized by the dominance of <i>Ceanothus megacarpus</i> and subdominance (averaging about half as much cover) of <i>Adenostoma fasciculatum</i> in the shrub layer. The herbaceous layer is insignificant. The emergent tree layer may infrequently include <i>Quercus agrifolia</i>.
Comm #618	Tsuga canadensis - Acer rubrum - (Liriodendron tulipifera, Nyssa sylvatica) / Rhododendron maximum / Sphagnum spp. Forest » more details accession code: VB.CC.37524.CEGL007565		31	This palustrine forest has a closed or open canopy and an open to dense shrub layer, interspersed with small <i>Sphagnum</i>-herb dominated depressions. These forests are found throughout the Southern Blue Ridge, and in the Cumberland Mountains and Cumberland Plateau, at elevations below 1200 m (4000 feet), in poorly drained bottomlands, generally with visible microtopography of ridges and sloughs or depressions. It often occurs near streams and is undoubtedly occasionally flooded. The canopy is composed of various mixtures of evergreen and deciduous species, often dominated by <i>Tsuga canadensis</i> and <i>Acer rubrum</i>, and less often by <i>Liriodendron tulipifera, Nyssa sylvatica, Pinus strobus</i>, or <i>Pinus rigida</i>. The dominant shrubs are usually <i>Rhododendron maximum, Kalmia latifolia</i>, and <i>Leucothoe fontanesiana</i>, but other shrubs include <i>Salix nigra, Alnus serrulata, Ilex montana, Cornus amomum, Viburnum nudum var. cassinoides</i>, and <i>Toxicodendron vernix</i>. Herbs in <i>Sphagnum</i>-herb dominated openings include <i>Solidago patula var. patula, Symphyotrichum puniceum (= Aster puniceus), Dalibarda repens, Osmunda cinnamomea, Carex folliculata, Carex gynandra, Carex scabrata, Carex leptalea, Carex stricta, Sarracenia purpurea, Sagittaria latifolia (= var. pubescens)</i>, and <i>Leersia virginica</i>. Herbs in the forested areas include <i>Glyceria melicaria, Lycopodium obscurum, Onoclea sensibilis, Maianthemum canadense, Thelypteris noveboracensis</i>, and <i>Osmunda regalis var. spectabilis</i>.
Comm #619	Pinus palustris / Quercus laevis - Quercus margarettae / Licania michauxii / Aristida beyrichiana Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:33278-{DF14D95D-8AF7-44C4-BFC4-66430B505354}	NatureServe Biotics 2019	31	This association occurs on deep, infertile, coarse sands in the South Atlantic Coastal Plain and East Gulf Coastal Plain of Georgia. <i>Pinus palustris</i> forms the open to sparse canopy and a dense scrub oak subcanopy is codominated by <i>Quercus laevis</i> and <i>Quercus margarettae</i>. Constant and indicative shrubs include <i>Licania michauxii, Opuntia humifusa</i>, and <i>Serenoa repens</i>. The herbaceous layer is dominated by <i>Aristida beyrichiana</i>, but other characteristic and abundant herbs include <i>Andropogon virginicus, Aristida purpurascens var. virgata, Aureolaria pectinata, Bulbostylis</i> spp., <i>Croton argyranthemus, Dichanthelium acuminatum, Eriogonum tomentosum, Eupatorium compositifolium, Liatris tenuifolia, Sorghastrum secundum, Sporobolus junceus, Tephrosia virginiana</i>, and <i>Tillandsia usneoides</i>. Species richness is relatively low, especially compared to moister longleaf pine vegetation types.
Comm #620	Picea pungens / Alnus incana Riparian Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:29803-{C82FE334-022D-4B53-87E8-05021D2AB0F1}	NatureServe Biotics 2019	31	This spruce woodland occurs in montane-subalpine riparian areas in Colorado, Wyoming and possibly New Mexico. Elevation ranges from 1900 to 3200 m (6100-10,650 feet). Stands occur in deep, shaded canyons and narrow valleys along relatively straight stream reaches where it generally forms small patches, but can be continuous for several river miles. These canyon floodplains and stream benches are variable in width but are in areas with cold-air drainage and limited sunlight. Soils are generally shallow and range from loamy sand to silty clay loams with high organic matter content over gravel, cobbles, or boulders. Vegetation is characterized by a somewhat open to moderately dense canopy (20-70% cover) that is typically strongly dominated by <i>Picea pungens</i> with 10-70% cover in overstory. Other trees occur infrequently but may include <i>Pseudotsuga menziesii, Populus angustifolia, Picea engelmannii</i>, or <i>Pinus ponderosa</i>. <i>Abies lasiocarpa</i> may be present to codominant with 1-50% cover in higher elevation stands. There are typically many seedlings and saplings as well as mature trees. The thick shrub understory is confined to a narrow band lining the stream channel. Shrub species include 10-80% cover of <i>Alnus incana</i>, 0-40% cover of <i>Salix drummondiana</i>, 0-30% cover each of <i>Salix monticola</i> and <i>Acer glabrum</i>, and 0-10% cover each of <i>Cornus sericea</i> and <i>Lonicera involucrata</i>. Additional shrubs include <i>Rosa woodsii, Dasiphora fruticosa ssp. floribunda, Ribes lacustre, Salix monticola</i>, and <i>Sambucus racemosa</i>, in addition to incidental shrubs more common in the surrounding uplands. The forb layer is species-rich with up to 40 species and dense, with a total of up to 50% cover. Forb species include <i>Actaea rubra, Conioselinum scopulorum, Oxypolis fendleri, Geranium richardsonii, Heracleum maximum, Maianthemum stellatum, Mertensia ciliata, Osmorhiza berteroi, Rudbeckia laciniata</i>, and <i>Equisetum arvense</i>. Graminoids often include <i>Calamagrostis canadensis, Bromus ciliatus</i>, and <i>Carex</i> spp.