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Add/Drop	Name	Reference	Plots↓	Description
Comm #1301	Quercus lobata / Herbaceous Semi-Riparian Association » more details accession code: urn:lsid:vegbank.org/vegbranch:commConcept:28626-{423B891B-B81E-44B5-93FD-B2539C023434} NOT CURRENTLY ACCEPTED	MCV2	13
Comm #1302	Quercus wislizeni – Quercus douglasii – Aesculus californica Association » more details accession code: urn:lsid:vegbank.org/vegbranch:commConcept:28633-{75A3460E-F0DA-4A53-9B34-2D1C22F6754B} NOT CURRENTLY ACCEPTED	MCV2	13
Comm #1303	Pinus ponderosa / Carex inops ssp. heliophila Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:29758-{9BA903CF-EFA5-4F3C-A625-0BA221C86ACD}	NatureServe Biotics 2019	13	This ponderosa pine / sedge woodland is found in the Black Hills region, along the Rocky Mountain Front Range from Montana to Colorado, and in north-central and western New Mexico. Along the Rocky Mountains, this association occurs from the foothills to 2900 m (9500 feet) in elevation, although its elevation decreases farther north. Stands occur in relatively mesic savanna habitats, on gentle to moderate south- and west-facing slopes. In north-central New Mexico, this association occurs at mid-elevation (1920-2560 m [6300-8400 feet]) on sites with moderate to high solar exposure that increases with elevation. Aspects tend to be more northerly at lower elevation, more southerly on higher sites. Slopes range from gentle to moderate (8-20%), and occasionally very steep (&gt;50%). Substrates are variable and may include the following soil types: poorly-developed and rocky Inceptisols from rhyolitic colluviums; finer-textured Alfisols from rhyolitic slope alluvium; gravely Mollisols from rhyolite tuff; or pumice slope alluvium. Some sites are predominantly rock outcrop. At El Malpais National Monument in west-central New Mexico, it typically occurs on gently rolling basalt lava plateaus and collapse features, though occasionally it is found on steep sideslopes of cinder cones and cinder fields. The ground surface is characterized by scattered bunchgrasses and sedges intermixed with litter, and some sites are very rocky. Diagnostic characteristics of this association are the open canopy of <i>Pinus ponderosa</i> over a graminoid layer dominated by <i>Carex inops ssp. heliophila</i>. Occasional canopy associates include <i>Juniperus scopulorum, Pseudotsuga menziesii</i>, or <i>Quercus macrocarpa</i> in the subcanopy, depending on which portion of the geographic range the stand is found. The understory has a characteristically sparse (&lt;5%) cover of shrubs, most frequently <i>Quercus x pauciloba, Ribes cereum</i>, and <i>Rhus trilobata</i>. The herbaceous layer is dominated by <i>Carex inops ssp. heliophila</i>, with inclusions of <i>Danthonia spicata, Poa fendleriana, Muhlenbergia montana, Schizachyrium scoparium, Pseudoroegneria spicata</i>, and <i>Bouteloua gracilis</i>, generally in areas with more open canopies. Within Bandelier National Monument in north-central New Mexico, canopy cover ranges from open woodland to closed-canopied forests (25% to &gt;60% cover). Density of mature <i>Pinus ponderosa</i> is moderate and reproduction is rare or absent. Other conifers such as <i>Abies concolor, Pseudotsuga menziesii</i>, and <i>Pinus flexilis</i> are rare or absent in the overstory. Shrubs are a minor component of the stands. The herbaceous layer is rich in species but variable in cover. The most diagnostic and abundant graminoid is <i>Carex inops ssp. heliophila</i>, with other abundant species including deer sedges (<i>Carex occidentalis, Carex rossii</i>, and <i>Carex geophila</i>). While forbs are diverse, composition is variable from stand to stand and usually less than 5% total cover.
Comm #1304	Hesperostipa comata Bunch Herbaceous Alliance » more details accession code: VB.cc.30696.HESPEROSTIPACOM	NVC 2004	13
Comm #1305	Liriodendron tulipifera - Pinus taeda Ruderal Forest » more details accession code: urn:lsid:vegbank.org:commConcept:35722-{8F51F90A-89B9-4AFB-BBCA-627B9139666F}	NatureServe Biotics 2019	13	The initial USNVC description of this semi-natural tuliptree - loblolly pine forest was based on sites in the Piedmont of South Carolina, but it has since been documented in Virginia, Georgia and Alabama, and is almost certainly present in other parts of the Piedmont. The vegetation develops on slopes following cropping. This forest is strongly dominated by <i>Liriodendron tulipifera</i> and <i>Pinus taeda</i> which together contribute more than 75% canopy cover. Other canopy species include <i>Liquidambar styraciflua</i> and <i>Acer rubrum</i>. <i>Cornus florida</i> sometimes occurs in the subcanopy, and vines such as <i>Lonicera japonica</i> (exotic), <i>Smilax rotundifolia</i> and <i>Toxicodendron radicans</i> may be abundant. The understory and ground layers are very sparse with much open ground present. The invasive exotic <i>Microstegium vimineum</i> may be present in the herbaceous layer.
Comm #1306	Populus tremuloides / Tall Forbs Forest » more details accession code: urn:lsid:vegbank.org:commConcept:29527-{AAE21DA3-DAAF-419A-B478-9021E072B4C8}	NatureServe Biotics 2019	13	This <i>Populus tremuloides</i> forest is one of the most common and abundant aspen forest types in the Rocky Mountains. It occurs throughout mountainous areas and occurs on any aspect but tends to occur more often on north-facing slopes. It can be found on steep moist hillsides and often along narrow riparian areas. The broad-leaved deciduous tree canopy in dominated by <i>Populus tremuloides</i>. Low shrubs are virtually absent from this type. The undergrowth is characterized by a thick carpet of tall forbs (&lt;1 m) with no one species dominant. Tall forbs include <i>Agastache urticifolia, Delphinium x occidentale, Eucephalus engelmannii, Hackelia floribunda, Heracleum maximum, Mertensia arizonica, Osmorhiza occidentalis, Senecio serra</i>, and <i>Valeriana occidentalis</i>. Other herbaceous species are present, including graminoid species. Forb species in streambank stands can be different from hillside stands.
Comm #1307	Pinus ponderosa / Juniperus communis Woodland » more details accession code: urn:lsid:vegbank.org:commConcept:29768-{3E524010-357C-4AC3-A004-89B4C218DBC8}	NatureServe Biotics 2019	13	This ponderosa pine / common juniper community type is found on moderate north- and west-facing slopes in the northern Rocky Mountain foothills and adjacent Great Plains of the United States. The parent material is most often limestone but it can be igneous rock. The soils are shallow and loamy. This community is a woodland dominated by <i>Pinus ponderosa</i> with occasional individuals of <i>Juniperus scopulorum, Picea glauca, Betula papyrifera</i>, and <i>Populus tremuloides</i> in the canopy. There is a prominent low-shrub layer composed largely of <i>Juniperus communis</i>, although <i>Arctostaphylos uva-ursi</i> and <i>Mahonia repens</i> are frequently represented in this type. The herb layer is sparse and made up mostly of graminoids such as <i>Schizachyrium scoparium</i> and <i>Carex inops ssp. heliophila</i>.
Comm #1308	Salix ligulifolia Wet Shrubland » more details accession code: urn:lsid:vegbank.org:commConcept:30127-{D7A14791-AC32-4E04-9F58-C81F2EE44CEE}	NatureServe Biotics 2019	13	This association is a medium to tall (1.5-3 m [5-15 feet]) willow shrubland occurring in saturated areas at elevations of 1424 to 3295 m (4700 -10,800 feet). It occurs in the wettest part of the riparian zone, usually adjacent to the channel on low point bars, islands, and overflow channels. At higher elevations, it occurs in relatively broad valley bottoms along low terraces and floodplains, and along streambanks of narrower reaches. At lower elevations, it occurs generally directly in the stream channel, on the rims of slickrock potholes and other wet valley bottoms. Soils are saturated sandy loams and clay loams with a high organic matter content in the upper layers. <i>Salix ligulifolia</i> is found in mixed stands with other willows such as <i>Salix monticola, Salix geyeriana</i>, and <i>Salix drummondiana</i>. <i>Salix ligulifolia</i> is the key diagnostic species; other willows may have equal cover, but in general do not exceed that of <i>Salix ligulifolia</i>. The herbaceous undergrowth can be dense in undisturbed stands with <i>Carex utriculata, Carex nebrascensis, Carex pellita, Juncus arcticus ssp. littoralis</i>, and <i>Calamagrostis canadensis</i>. Forb cover is generally low. ~<i>Salix exigua - Salix ligulifolia</i> Wet Shrubland (CEGL002655)$$ is a closely related association occurring in the Colorado foothills at lower elevations.
Comm #1309	Schoenoplectus tabernaemontani - Typha spp. - (Sparganium spp., Juncus spp.) Marsh » more details accession code: urn:lsid:vegbank.org:commConcept:30935-{5436266E-ECC1-44E6-93E5-045609BBC58A}	NatureServe Biotics 2019	13	This shallow marsh mixed emergent community ranges broadly over the midwestern United States and adjacent Canada. It is found in basin-like depressions, backwater areas of floodplains, and shallow margins of lakes or ponds. Soils are shallow to deep, very poorly drained, consisting of peats, mucks, or mineral materials, often found in alluvium. Vegetation varies from zones dominated by tall emergents 1-2 m tall to those with hydrophytic annual and perennial forbs &lt;1 m tall. In the tall emergent zone, <i>Schoenoplectus acutus, Bolboschoenus fluviatilis, Schoenoplectus tabernaemontani, Typha angustifolia</i>, and <i>Typha latifolia</i> may dominate, mixed with a variety of other herbaceous species, such as <i>Eleocharis palustris, Juncus</i> spp., <i>Leersia oryzoides</i>, and <i>Sparganium</i> spp. The hydrophytic annual and perennial forb zone is dominated by <i>Alisma subcordatum, Alisma triviale, Sagittaria latifolia, Sparganium eurycarpum, Pontederia cordata</i>, along with <i>Bacopa rotundifolia</i> and <i>Heteranthera limosa</i>. Occasional floating-leaved aquatics are sometimes present, including <i>Azolla caroliniana, Lemna</i> spp., <i>Spirodela polyrrhiza</i>, and <i>Utricularia macrorhiza</i>.
Comm #1310	Arctostaphylos myrtifolia Shrubland » more details accession code: urn:lsid:vegbank.org:commConcept:31910-{1489BFAF-33B4-4595-8BCA-81908596A0D7}	NatureServe Biotics 2019	13	This vegetation type is found in the western foothills of the Sierra Nevada, at elevations ranging from 100 to 300 m. The region where it occurs is directly to the east of the Golden Gate and San Francisco Bay, where maritime air masses can pass into the Central Valley. This is a low, heath-like chaparral vegetation type composed of shrubs less than 1 m in height and scattered forbs. The broad-leaved evergreen shrub <i>Arctostaphylos myrtifolia</i> dominates, and sometimes is the only shrub present. In mature stands, cover of shrubs usually exceeds 50%. Other shrubs that may be present include <i>Adenostoma fasciculatum, Frangula californica ssp. tomentella, Quercus berberidifolia, Quercus wislizeni, Arctostaphylos viscida</i>, and <i>Ceanothus tomentosus</i>. The herbaceous layer is sparse, but may include the forbs <i>Lotus scoparius, Eriogonum apricum</i> and <i>Helianthemum scoparium</i>. A layer of both mosses and lichens is present. The climate is dry and hot in summer, with prolonged periods of intense heat. However, the influence of maritime air results in summer high temperatures that are less intense than elsewhere in the Sierra Nevada foothills. Winters are cool and moist. Annual precipitation ranges from 53 cm to slightly over 80 cm, and most occurs during the winter months as rain. Frosts are infrequent and slight. Relative humidities are high enough to support epiphytic lichens. This vegetation type is restricted to outcrops of the Eocene Ione Formation or sediments derived from this formation. The formation is composed of kaolinitic clay minerals, quartz sand, and ironstone. The soils are strongly acidic, shallow, nutrient-poor and relatively coarse in texture. Sites supporting this type include exposed southerly slopes and ridgetops, as well as gullies and washes. This association requires fire, both for regeneration and to prevent shading from surrounding chaparral types.