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Danthonia unispicata - Poa secunda Wet Meadow | NatureServe Biotics 2019
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Name: Danthonia unispicata - Poa secunda Wet Meadow
Reference: NatureServe Biotics 2019
Description: This grassland association occurs in scablands of the Snake River plain in northeastern Oregon and likely occurs in Washington. It has also been reported from Wyoming, but information is not available. Stands are found on dry, level to undulating plateau and ridgetops at elevations of 1130-1830 m. This association is restricted to less xeric sites, such as slightly concave or seep areas where there is supplementary soil moisture. Vernal pools are not uncommon in this type. Soils are shallow (7-25 cm), rocky (40-60% coarse fraction) loams that are derived from basalt and loess. These soils are underlain by non-fractured basalt bedrock. The soil surface is stabilized by high cover of rock and moss. During the winter, these soils are often saturated. Disturbance from frost boils is common. The bedrock in not fractured and therefore cannot support deeper-rooted bunchgrasses such as <i>Pseudoroegneria spicata</i> and <i>Festuca idahoensis</i>, or shrubs. This association has a sparse to moderately dense herbaceous layer codominated by the perennial graminoids <i>Poa secunda</i> and <i>Danthonia unispicata</i>. The <i>Danthonia unispicata</i> often occurs in patches where soil moisture accumulates. Common forbs may include <i>Antennaria</i> spp., <i>Balsamorhiza incana, Sedum</i> spp., <i>Lomatium</i> spp., <i>Erigeron chrysopsidis, Polygonum</i> spp., and <i>Trifolium macrocephalum</i>. Stands may form a mosaic with drier sites dominated by <i>Poa secunda</i> without <i>Danthonia unispicata</i>, and areas with fractured bedrock with an open canopy of the dwarf-shrub <i>Artemisia rigida</i>. 
Accession Code: urn:lsid:vegbank.org:commConcept:30692-{7D4F06F6-7F7A-4F37-9595-F464D4FE3781}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.686576 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL001783
  Translated: Few-flower Wild Oatgrass - Sandberg Bluegrass Wet Meadow
  Scientific: Danthonia unispicata - Poa secunda Wet Meadow
(convergence) and Synonyms:
(similar) CEGL001783
(similar) Danthonia unispicata - Poa secunda Herbaceous Vegetation
(similar) Danthonia unispicata - Poa secunda Herbaceous Vegetation