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Name
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Reference
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Plots↓
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Description |
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Populus fremontii
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accession code:
NOT CURRENTLY ACCEPTED
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CDFW Natural Communities List |
1
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Quercus lobata – Fraxinus latifolia / Vitis californica
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accession code:
NOT CURRENTLY ACCEPTED
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CDFW Natural Communities List |
1
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Comm #4561
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Picea engelmannii / Vaccinium caespitosum Forest
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accession code: urn:lsid:vegbank.org:commConcept:29287-{98532241-3A54-41C7-85D3-CB5BB4766F0C}
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NatureServe Biotics 2019 |
1
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Comm #4562
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Picea pungens / Equisetum arvense Riparian Woodland
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accession code: urn:lsid:vegbank.org:commConcept:29298-{E46936CD-01C2-4E0C-941B-3E05288CBD22}
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NatureServe Biotics 2019 |
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This association is restricted to narrow canyons and cool ravines on stream benches and streambanks in Colorado, Utah, and Wyoming. Stands occur at elevations of 2135-2745 m (7000-9000 feet) and are characterized by dominance of <i>Picea pungens</i> with a thick understory of <i>Equisetum arvense</i> and few shrubs. Other tree species possibly present include <i>Pseudotsuga menziesii, Pinus contorta</i>, and <i>Picea engelmannii</i>. Shrub cover is minor, yet diverse and may include <i>Betula glandulosa, Salix geyeriana, Salix monticola</i>, and <i>Rosa woodsii</i>. The herbaceous undergrowth typically consists of few species including <i>Equisetum arvense, Carex aquatilis</i>, and <i>Juncus arcticus ssp. littoralis</i>. Frequent flooding appears important to maintaining the species in the herbaceous layer. |
Comm #4563
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Thuja plicata / Gymnocarpium dryopteris Forest
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accession code: urn:lsid:vegbank.org:commConcept:29385-{CAFDFC11-26B0-4B1F-8C50-66C80750A7E2}
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NatureServe Biotics 2019 |
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This <i>Thuja plicata</i> forest association is known from the northern Rocky Mountains of British Columbia, northern Idaho and northwestern Montana. It represents one of the driest <i>Thuja plicata</i> riparian communities, and the driest <i>Thuja</i> type to have a fern layer. It occurs at elevations ranging from 975 to 1370 m (3200-4500 feet). Typical locations include slopes or benches along major mountain streams. Slopes are moderate to steep, and stands are generally located on mid to lower slopes. Parent materials are usually quartzite, sandstone, or schist, often mixed or overlain with volcanic ash. Soils are gravelly loams to silty clay loam to silt. Stands are subirrigated yet well-drained. Duff layers average 8 cm in depth. Late-seral stands have closed canopies and are dominated by <i>Thuja plicata</i>. Stands not in a late-seral stage are more heterogeneous, with a mix of conifers in addition to <i>Thuja</i>. Seral species persisting in these stands include <i>Abies grandis</i> as the most abundant and common. Others include <i>Tsuga heterophylla, Picea engelmannii</i> (or <i>Picea x albertiana</i>), <i>Pinus monticola, Larix occidentalis</i>, and <i>Pseudotsuga menziesii</i>. The shrub layer is typically limited to 10-20% total cover. Highly constant species include <i>Acer glabrum, Lonicera utahensis, Linnaea borealis, Rubus parviflorus</i>, and <i>Taxus brevifolia</i>. The herbaceous layer has mostly ferns and forb species with few to no grasses. <i>Gymnocarpium dryopteris</i> is diagnostic for this type, with at least 1% cover, but is often much more abundant. <i>Athyrium filix-femina</i> or <i>Adiantum pedatum</i> are often present, but with low cover or only on moist microsites. Other highly constant mesic forbs include <i>Clintonia uniflora, Tiarella trifoliata, Coptis occidentalis, Osmorhiza berteroi, Prosartes hookeri, Aralia nudicaulis</i>, and <i>Maianthemum stellatum</i>. |
Comm #4564
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SPIKE TRISETUM HERBACEOUS ALLIANCE
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accession code: VB.cc.30280.SPIKETRISETUMHE
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NVC 2004 |
1
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Comm #4565
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ARTEMISIA TRIPARTITA SHRUB HERBACEOUS ALLIANCE
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accession code: VB.cc.29870.ARTEMISIATRIPAR
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NVC 2004 |
1
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Comm #4566
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Kalmia microphylla / Carex nigricans Wet Dwarf-shrubland
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accession code: urn:lsid:vegbank.org:commConcept:30311-{352F3FED-FE9D-4A50-9279-169A11F05BF3}
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NatureServe Biotics 2019 |
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This association may be widespread throughout the western United States and western Canada. It is currently known from California, Washington, Oregon, Montana, Colorado, and British Columbia. This is a dwarf-shrubland association found in moist subalpine and alpine meadows, snowbeds, lake margins, and other low-gradient depressions of the northern Rockies and Pacific ranges from 1585 to 3965 m (5200-13,000 feet) in elevation. These habitats are cold and snowy, with snowfields lingering into June or later. Soils are frigid, derived from bedrock or aggraded alluvium, usually high in organic matter, and strongly acidic. These communities are often associated with hummocky topography, which provides a juxtaposition of saturated and somewhat drained microhabitats. Water tables are often at or near the surface for much of the growing season, and organic decomposition is slow. This association is typified by a dominant dwarf-shrub layer of <i>Kalmia microphylla</i>. Other ericaceous shrubs, including <i>Phyllodoce empetriformis, Phyllodoce breweri, Ledum glandulosum</i> (not in Colorado), <i>Gaultheria humifusa</i>, and <i>Vaccinium</i> spp., are common associates. Dwarf <i>Salix</i> spp. may also be present, such as <i>Salix farriae</i> or <i>Salix arctica</i>. The herbaceous layer is typically dominated by graminoids, of which Carices usually predominate. <i>Carex nigricans</i> is the dominant species, with cover ranging from 10% to well over 50% or more. <i>Carex scopulorum, Carex spectabilis, Carex aquatilis, Carex norvegica ssp. stevenii, Carex nova, Carex canescens</i>, and <i>Carex pellita</i> are especially common. Grasses, such as <i>Calamagrostis canadensis, Deschampsia cespitosa, Danthonia intermedia</i>, and <i>Phleum alpinum</i>, may also be locally abundant. Mesic to hygric forbs are usually scattered through the graminoid matrix, including <i>Symphyotrichum spathulatum, Oreostemma alpigenum, Pedicularis groenlandica, Caltha leptosepala, Parnassia fimbriata, Trollius laxus, Veronica</i> spp., <i>Gentiana</i> spp., <i>Dodecatheon</i> spp., and <i>Epilobium</i> spp. The moss layer is often virtually continuous but can also be only a few percent. |
Comm #4567
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Hordeum jubatum Herbaceous Vegetation
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accession code: urn:lsid:vegbank.org:commConcept:30707-{641C2639-60CF-42C4-94F1-F5128AC89C1F}
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NatureServe Biotics 2019 |
1
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Comm #4568
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Populus angustifolia Sand Dune Riparian Forest
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accession code: urn:lsid:vegbank.org:commConcept:31551-{5FE54B93-A403-4386-B3E8-7F46A36D2FF6}
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NatureServe Biotics 2019 |
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This plant association consists of stands of <i>Populus angustifolia</i> atop sand dunes in the San Luis Valley of south-central Colorado at 2300 m elevation. Stands occur in an unusual environmental setting on braided, sandy streams adjacent to wind-driven, actively moving sand dunes. <i>Populus angustifolia</i> occurs on ridges of the sand dunes and increases in age with distance from the active stream channel. Stands consist of mature and young cottonwoods with no shrub or herbaceous plants in the understory. |
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