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Add/Drop	Name	Reference	Plots↓	Description
Comm #1011	Pinus banksiana - (Picea mariana, Pinus strobus) / Vaccinium spp. Rocky Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:31391-{1145B96A-8D68-4085-AC05-16F702860780}	NatureServe Biotics 2019	18	This jack pine - black spruce rocky woodland is found in central Canada and adjacent boreal forests of the Great Lakes in the United States. Stands typically occur on shallow, sandy or rocky sites. Soils vary from talus slopes and bare bedrock to deep mineral soils of coarse to fine sand. The tree canopy is open, with scattered <i>Pinus banksiana</i> and <i>Picea mariana</i>. The understory is quite open, with scattered clumps of shrubby <i>Picea mariana</i>. The dwarf-shrub layer contains <i>Vaccinium angustifolium</i> and <i>Vaccinium myrtilloides</i>. The herbaceous layer is sparse, containing <i>Cornus canadensis, Maianthemum canadense</i>, and <i>Melampyrum lineare</i>. The moss layer contains <i>Dicranum polysetum</i> and <i>Pleurozium schreberi</i>. Lichens include <i>Cladonia rangiferina, Cladonia arbuscula ssp. mitis</i>, and <i>Cladonia stellaris</i>.
Comm #1012	OPEN CLIFF SPARSE VEGETATION ALLIANCE » more details accession code: VB.cc.30494.OPENCLIFFSPARSE	NVC 2004	18
Comm #1013	Sarcocornia pacifica - (Batis maritima, Distichlis spicata) Saline Dwarf-shrubland » more details accession code: urn:lsid:vegbank.org:commConcept:31187-{61065F1F-4676-4AB2-8115-25D5CE0F4DF7}	NatureServe Biotics 2019	18	This is one of several associations found in tidally influenced hypersaline areas along the southern Atlantic Coast and Gulf of Mexico region. In contrast to other tidal salt flats or pannes of this region, examples attributable to this type are dominated by the succulent dwarf-shrub <i>Sarcocornia pacifica</i> while stands dominated by <i>Batis</i> or <i>Salicornia</i> are accommodated by other associations [see ~<i>Batis maritima - Sarcocornia pacifica</i> Saline Dwarf-shrubland (CEGL003956)$$ and ~<i>Salicornia (depressa, bigelovii, maritima) - Spartina alterniflora</i> Salt Marsh (CEGL004308)$$, respectively]. Examples of this association may occur in patches throughout this relatively large range. They vary somewhat locally in expression, but all tend to exhibit low vascular plant diversity, dominated by halophytic species. In addition to <i>Sarcocornia pacifica</i>, other commonly encountered species may include <i>Salicornia bigelovii, Distichlis spicata</i>, and sometimes stunted <i>Spartina alterniflora</i>. Other typical species can include <i>Batis maritima, Suaeda</i> spp., <i>Sporobolus virginicus, Sesuvium portulacastrum</i>, and <i>Limonium carolinianum</i>. Total vegetative cover is quite variable, from near total absence of vascular plants to a dense cover of the nominal species. Algal mats are characteristically present, visible even in densely vegetated pannes. Blue-green algae may contribute significantly more biomass than vascular species.
Comm #1014	Pinus banksiana - Picea mariana / Vaccinium spp. / Pleurozium schreberi Forest » more details accession code: urn:lsid:vegbank.org:commConcept:31356-{448C868E-5AE7-4FFE-B144-55FF119AE384}	NatureServe Biotics 2019	18	This jack pine - black spruce forest type is found in the boreal regions of central Canada and the adjacent United States. Stands occur on flat areas and gentle upper and lower slopes but not on ridges or valley floors. Soils are moderately deep (60-80 cm) sands, coarse loams, or silts with boulders often present at or near the surface. <i>Pinus banksiana</i> is usually the dominant canopy species but has little successful reproduction. <i>Picea mariana</i> is of secondary importance in the canopy but often the most abundant tree species in the lower strata. Other trees found in this community include <i>Abies balsamea, Acer rubrum, Picea glauca</i>, and <i>Populus tremuloides</i>. Tall and low shrubs are moderately common, while herbaceous species are infrequent. Mosses, especially <i>Pleurozium schreberi</i>, are abundant. Common shrubs are the tall shrubs <i>Alnus viridis, Amelanchier</i> spp., and <i>Corylus cornuta</i>, and the low shrubs <i>Diervilla lonicera, Gaultheria procumbens, Vaccinium angustifolium</i>, and <i>Vaccinium myrtilloides</i>. Herbaceous species include <i>Eurybia macrophylla, Clintonia borealis, Cornus canadensis</i>, and <i>Maianthemum canadense</i>.
Comm #1015	Alnus incana - Salix drummondiana Wet Shrubland » more details accession code: urn:lsid:vegbank.org:commConcept:31560-{CCC2ED87-3F1A-4ED2-BEEF-EF800D4418F1}	NatureServe Biotics 2019	18	This riparian shrubland association is common in mountains of Colorado and western Wyoming and likely occurs in adjacent New Mexico. Stands are generally found along steep-gradient streams between 2038 and 3000 m (6686-9835 feet) elevation. It is an early- to mid-seral community restricted to stream margins, alluvial surfaces, and coarse-textured cobble bars, rarely forming large or extensive stands. The vegetation is characterized by a dense, closed, tall-shrub canopy of 10-100% cover of <i>Alnus incana ssp. tenuifolia</i> and 10-60% cover of <i>Salix drummondiana</i>. Other shrubs occurring with greater than 25% frequency include <i>Salix monticola, Lonicera involucrata, Ribes inerme, Cornus sericea, Rosa woodsii</i>, and <i>Amelanchier utahensis</i>. Tree cover ranges from 0-20% dominated by <i>Picea pungens</i> (0-10%) and <i>Picea engelmannii</i> (0-23%). In some stands, heavy shading and recent flood scouring limit herbaceous growth (&lt;10%). Other stands have a rich herbaceous understory that includes <i>Heracleum maximum, Equisetum pratense, Rudbeckia laciniata</i>, and <i>Angelica ampla</i>. Diagnostic of this shrubland association is the codominance of <i>Alnus incana ssp. tenuifolia</i> and <i>Salix drummondiana</i> on sites that are flooded for brief periods during the growing season.
Comm #1016	Salix nigra Wet Shrubland » more details accession code: urn:lsid:vegbank.org:commConcept:32758-{5C6076D0-2557-4DE5-A10D-B74455FE82BB}	NatureServe Biotics 2019	18	This broadly defined type represents vegetation dominated by scrubby forms of <i>Salix nigra</i> across the southeastern and northeastern United States, and possibly into Canada. Stature and closure may vary depending on disturbance. Additional types may be developed as more information becomes available.
Comm #1017	Smilax auriculata / Heterotheca subaxillaris - Strophostyles helvola - (Uniola paniculata) Grassland » more details accession code: urn:lsid:vegbank.org:commConcept:33071-{9A24E574-FF14-4886-8450-FEC473D6EE3F}	NatureServe Biotics 2019	18	This coastal grassland community occurs in northeastern Florida, ranging from Volusia County, Florida, northwards to North Carolina. In Florida, this community occurs primarily on the broader barrier islands such as Amelia, Little Talbot, and Anastasia islands, and only on prograding coasts. The dominance of woody vines and forbs and relative rarity of grasses (<i>Uniola</i> only in 4 of 10 stands, <i>Spartina patens</i> in 2 of 10 stands in northeastern Florida) may separate these communities from related communities in the Carolinas. Other characteristic species recorded from Florida include <i>Triplasis purpurea, Sideroxylon tenax, Yucca gloriosa, Morella cerifera, Ipomoea imperati, Uniola paniculata, Spartina patens, Hydrocotyle bonariensis, Opuntia pusilla, Opuntia stricta</i>. This community differs from the less woody dune community in the same geographic area, ~<i>Uniola paniculata - Hydrocotyle bonariensis</i> Grassland (CEGL004040)$$.
Comm #1018	Quercus palustris - Quercus bicolor / Viburnum prunifolium / Leersia virginica - Impatiens capensis Wet Forest » more details accession code: urn:lsid:vegbank.org:commConcept:33426-{DA574C1C-86ED-47EC-8BA7-1C88D6B044C0}	NatureServe Biotics 2019	18	This wetland forest community is nearly endemic to hardpan soils of the Culpeper Basin in northern Virginia and Montgomery County, Maryland, with a few known outliers elsewhere in the Piedmont and the Ridge and Valley of Maryland, Virginia, and West Virginia. Habitats are shallow, seasonally flooded upland basins and wet, elongated bottoms along sluggish small streams with little or no active alluvial deposition. These habitats are characterized by shallow seasonal flooding induced by perched groundwater. Moderate hummock-and-hollow microtopography is often present, and maximum flooding depth is usually &lt;25 cm (10 inches). A-horizon soils are dark brown to blackish, loamy clays which typically exhibit pronounced orange and white mottling and have moderate base status. This type is most common on areas underlain by diabase but also occurs on some soils weathered from siltstone and other metasedimentary substrates. The vegetation is an open forest or woodland dominated by <i>Quercus palustris</i>, mixtures of <i>Quercus palustris</i> and <i>Quercus bicolor</i>, or less frequently <i>Quercus bicolor</i> alone. <i>Fraxinus pennsylvanica</i> and <i>Acer rubrum</i> are the most frequent subcanopy trees. <i>Viburnum prunifolium</i> is the sole shrub dominant, while <i>Smilax rotundifolia, Toxicodendron radicans</i>, and <i>Parthenocissus quinquefolia</i> are common climbing and scrambling vines. The herb layer is usually open or sparse. The most constant and characteristic herbs are <i>Leersia virginica, Cinna arundinacea, Impatiens capensis, Arisaema triphyllum, Symphyotrichum lateriflorum, Galium obtusum, Lycopus virginicus</i>, and <i>Juncus tenuis</i>. Less constant herbs that can be locally common or abundant include <i>Carex pellita, Carex festucacea, Dichanthelium acuminatum var. lindheimeri, Eleocharis tenuis var. tenuis, Glyceria striata, Scirpus georgianus</i>, and <i>Stachys pilosa var. arenicola</i>. The invasive exotic <i>Microstegium vimineum</i> can be problematic on the drier edges and hummocks.
Comm #1019	Sporobolus heterolepis - Schizachyrium scoparium - (Carex scirpoidea) / (Juniperus horizontalis) Grassland » more details accession code: urn:lsid:vegbank.org:commConcept:33997-{02CC692D-9557-47A3-9375-67467E752F9B}	NatureServe Biotics 2019	18	The little bluestem alvar grassland type is found primarily in the upper Great Lakes region of the United States and Canada, in northern Michigan and in Ontario. These grasslands occur on very shallow, patchy soils (usually less than 20 cm deep, average is about 6 cm deep) on flat limestone and dolostone outcrops (pavements). Soils are loams high in organic matter. This community often has a characteristic soil moisture regime of alternating wet and dry periods; they can have wet, saturated soils in spring and fall, combined with summer drought in most years (except unusually wet years). In large patches over 50 acres (20 ha) this grassland often occurs as a small-scale matrix, with smaller patches of other alvar communities occurring within the larger patch of little bluestem alvar grassland, forming a landscape mosaic. The vegetation is dominated by grasses and sedges, which usually have at least 50% cover. Characteristic species of the grassland are <i>Sporobolus heterolepis, Schizachyrium scoparium, Carex scirpoidea, Deschampsia cespitosa, Packera paupercula</i>, and <i>Carex crawei</i>. There is usually less than 10% cover of shrubs over 0.5 m tall; however, there may be as much as 50% cover of dwarf-shrubs (under 0.5 m tall), especially <i>Juniperus horizontalis</i>. This dwarf-shrub is shorter than the dominant grasses, and usually is found under the canopy of grasses, so the physiognomic type is here considered a grassland (in spite of relatively high cover of dwarf-shrubs). Less than 50% of the ground surface is exposed bedrock (including bedrock covered with nonvascular plants: lichens, mosses, algae).
Comm #1020	Quercus virginiana - Celtis laevigata - Tilia americana var. caroliniana / Aesculus pavia - Ilex vomitoria Forest » more details accession code: urn:lsid:vegbank.org:commConcept:35535-{EF1477B9-C18D-4977-823F-075047E1024C}	NatureServe Biotics 2019	18	This association is a calcareous coastal fringe forest of the Mid-Atlantic Coastal Plain of North Carolina. Two sites are known in North Carolina, both examples occurring on sandy soils with abundant shell associated with prehistoric shell midden sites. The short canopy is dominated by <i>Quercus virginiana</i>, with <i>Celtis laevigata var. laevigata</i> and/or <i>Tilia americana var. caroliniana</i> codominant or abundant. Other common species include <i>Ulmus rubra</i> and <i>Pinus taeda</i>. The understory includes <i>Persea palustris, Aesculus pavia, Acer floridanum, Zanthoxylum clava-herculis</i>, and <i>Carpinus caroliniana</i>. The most abundant shrubs are <i>Ilex vomitoria</i> and <i>Sabal minor</i>. Woody vines are common and include <i>Parthenocissus quinquefolia, Toxicodendron radicans, Berchemia scandens</i>, and <i>Smilax</i> spp. The herb stratum is sparse.