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Name
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Reference
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Plots↓
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Description |
Comm #3001
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Populus angustifolia / Salix drummondiana - Acer glabrum Riparian Woodland
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accession code: urn:lsid:vegbank.org:commConcept:31554-{50129390-DCA4-47A9-95C0-65EE6CAC50F6}
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NatureServe Biotics 2019 |
3
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This riparian plant association is a lush deciduous forest occurring on an active alluvial floodplain of Sand Creek in the Sangre de Cristo Mountains of southern Colorado (1800-2000 m elevation). It is characterized by a relatively sparse to dense overstory of <i>Populus angustifolia</i> and <i>Salix drummondiana</i> (20-80% cover) along the immediate streambank and scattered <i>Acer glabrum</i> (5-20% cover) and other willows. Tall and medium-sized <i>Populus angustifolia</i> dominate the upper canopy. Other trees present may include <i>Abies concolor, Populus tremuloides</i>, and <i>Pseudotsuga menziesii</i>. <i>Rosa woodsii</i> was present in all sampled stands with 5-30% cover. Other shrubs include <i>Alnus incana, Jamesia americana, Salix lucida</i>, and <i>Prunus virginiana</i>. Herbaceous cover is generally low (10-15% cover), including <i>Orthilia secunda, Maianthemum stellatum, Pyrola asarifolia</i>, and <i>Oxypolis fendleri</i>. |
Comm #3002
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Betula occidentalis / Mesic Graminoids Wet Shrubland
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accession code: urn:lsid:vegbank.org:commConcept:31562-{90204512-B3DC-4C63-ACAB-AC228558BEA7}
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NatureServe Biotics 2019 |
3
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This shrubland association often occurs as dense bands up to 35 m wide along moderately wide to wide floodplains in mountain valleys of Colorado, Nevada and Utah. Stands also occur in small patches at higher elevations and around seeps and isolated springs on hillslopes away from the valley bottom. These shrublands are characterized by bands of vegetation dominated by <i>Betula occidentalis</i> (40-60% canopy cover) but often including <i>Ribes inerme</i> and <i>Salix bebbiana</i>. This vegetation may extend well way from the channel edge in deep pockets of sandy loam soils. <i>Alnus incana</i> may be codominant. <i>Picea pungens</i> and <i>Juniperus scopulorum</i> may also be present but usually with low cover. Stands with a dense shrub layer may have a limited (<10%) but diverse herbaceous cover. Graminoids typically dominate the herbaceous layer where the most abundant species usually include <i>Carex pellita, Carex deweyana</i>, or <i>Carex nebrascensis</i>. <i>Deschampsia cespitosa</i> and <i>Carex utriculata</i> are often present as well. Forb cover often includes <i>Achillea millefolium, Cardamine cordifolia, Heracleum maximum, Maianthemum stellatum</i>, and <i>Vicia americana</i>. Scouring rushes (<i>Equisetum</i> spp.) may also have significant cover. The introduced grasses <i>Agrostis stolonifera</i> and <i>Poa pratensis</i> may be present in disturbed stands. Diagnostic of this association is the dominance of <i>Betula occidentalis</i> in the shrub layer and the dominance of mesic graminoids in the herbaceous layer. |
Comm #3003
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Sporobolus cryptandrus Great Basin Grassland
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accession code: urn:lsid:vegbank.org:commConcept:31599-{274382F1-3F72-4377-A499-94590167D3E8}
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NatureServe Biotics 2019 |
3
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The association is found on terraces of large rivers in the Colorado Plateau and Uinta Basin and likely occurs elsewhere in the southwestern U.S. The vegetation is dominated by the warm-season perennial graminoid <i>Sporobolus cryptandrus</i>. Other graminoids such as <i>Achnatherum hymenoides, Equisetum variegatum, Hesperostipa comata, Pleuraphis jamesii, Sporobolus contractus</i>, or <i>Sporobolus giganteus</i> frequently occur in low abundance. Low cover of native forbs such as <i>Sphaeralcea grossulariifolia</i> or <i>Chamaesyce fendleri</i> may be present. The introduced annual grass <i>Bromus tectorum</i> and several other exotic or invasive species such as <i>Bromus diandrus ssp. rigidus, Schismus barbatus, Salsola kali, Helianthus annuus, Sisymbrium altissimum</i>, or <i>Tribulus terrestris</i> may be present to abundant, especially on disturbed riparian stands. Occasional <i>Brickellia</i> spp. or other shrubs may occur, but they are not dense enough to form a shrub layer. This plant association is described from the Uinta Basin and Colorado Plateau where it occurs on alluvial terraces of major rivers, sandy upper stream terraces along intermittent washes, and on sand deposits on mesas and plains. Elevation ranges from 1158 to 1630 m. Soils are loamy sands and sandy loams derived from alluvium, eolian deposits or sandstone residuum. Sites have generally been disturbed by flooding, shifting sands, livestock grazing, or human recreation. |
Comm #3004
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Azolla (filiculoides, microphylla) Aquatic Vegetation
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accession code: urn:lsid:vegbank.org:commConcept:31917-{F2F45916-EAEF-411D-AB30-2CEC328A085C}
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NatureServe Biotics 2019 |
3
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Habitat is low-elevation eutrophic ponds, lakes, and sloughs with little water movement. Species of <i>Azolla</i> occur throughout northwestern Oregon, but stands extensive enough to be considered occurrences of this association are most common in low-elevation areas in the Coast Range and Willamette Valley. They typically form nearly monotypic green or reddish mats that float on the surface of lakes and ponds, often growing so dense that no open water is visible. <i>Azolla</i> needs open water to proliferate in winter and spring, but it tolerates being stranded on mudflats when shallow pools dry out in summer. Mudflat sites are not uncommon, particularly on large floodplains, and in this habitat the <i>Azolla</i> mat develops a peculiar lumpy surface with varied microtopography. Elements of the <i>Lemna minor</i> association (<i>Lemna, Spirodela, Ricciocarpos</i>) may often be intermixed with <i>Azolla</i> but are always subordinate to <i>Azolla</i>. Eutrophic conditions favored by this association may be enhanced by enriched runoff in agricultural or urban landscapes. |
Comm #3005
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Isoetes (bolanderi, tenella, occidentalis) Aquatic Vegetation [Placeholder]
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accession code: urn:lsid:vegbank.org:commConcept:31948-{9962156B-4A20-4E05-BE94-ABE8B382FBFC}
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NatureServe Biotics 2019 |
3
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Comm #3006
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Cercocarpus montanus var. glaber Association
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accession code: urn:lsid:vegbank.org/vegbranch:commConcept:28856-{33E9B95E-BC68-4598-8638-33C902F908E6}
NOT CURRENTLY ACCEPTED
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MCV2 |
3
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Comm #3007
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Salix planifolia / Carex utriculata Shrubland
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accession code: VB.CC.29418.SALIXPLANIFOLIA
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Carsey et al 2003b |
3
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The Salix planifolia/Carex utriculata (planeleaf willow/beaked sedge) plant association is a low-stature willow shrubland that grows in wet to saturated soils above 8900 feet (2712 m). It appears to be much less common than the related Salix planifolia/Carex aquatilis (planeleaf willow/water sedge) association, and is probably indicative of wetter sites. |
Comm #3008
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Adenostoma fasciculatum – (Arctostaphylos manzanita) Association
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accession code: urn:lsid:vegbank.org/vegbranch:commConcept:28846-{8A6349E9-E6E3-4E9C-82E3-2DB1DC17506F}
NOT CURRENTLY ACCEPTED
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MCV2 |
3
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Comm #3009
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Phalaris aquatica – Bromus hordeaceus – Centaurea solstitialis Association
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accession code: urn:lsid:vegbank.org/vegbranch:commConcept:28883-{773D7322-7D67-44AC-B832-792FE688FF60}
NOT CURRENTLY ACCEPTED
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MCV2 |
3
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Comm #3010
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Blepharoneuron tricholepis Herbaceous Alliance
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accession code: VB.cc.29920.BLEPHARONEURONT
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NVC 2004 |
3
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