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A.1410 | EcoArt 2002
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Name: A.1410
Reference: EcoArt 2002
Description: Stands included in this seasonally flooded grassland alliance are found in eastern Oregon's Columbia Basin and northwestern Nevada. The elevational range is from 1900-2400 m. Stands are found in flat, poorly drained floodplains and internally drained basins or historic lake basins (playas). Soils are moderately deep to deep, alkaline loams or clay loams. They are typically flooded in the spring and have a shallow water table that may drop below 1 m by the early summer. Upper soil horizons may be well-drained. Parent material is alluvium that may be derived from volcanic ash, rhyolite or basalt. Stands have moderately dense cover of perennial bunch grasses that are typically less than 0.5 m tall, but may extend up to 1 m. ~Poa secunda$ dominates or codominates the stands with ~Puccinellia lemmonii$ or ~Elymus elymoides$. Other consistent graminoids may include ~Carex microptera, Hordeum brachyantherum, Muhlenbergia richardsonis, Juncus balticus, Juncus ensifolius$, and ~Pseudoroegneria spicata$. Forbs commonly found include the perennials ~Achillea millefolium, Arnica longifolia, Iris missouriensis, Stellaria longipes$, and the annuals ~Montia linearis$ and ~Trifolium cyathiferum$. The deciduous, succulent-leaved shrub ~Sarcobatus vermiculatus$ may occasionally occur in some stands and is typically 1-3 m tall. Estimates of plant species cover were not available. Adjacent vegetation may include fresh or saline wetlands dominated by species of ~Carex$ or ~Juncus$. Uplands are typically shrublands dominated by ~Artemisia tridentata ssp. vaseyana$. 
Accession Code: VB.CC.1185.A1410
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: 17-Mar-2005
     
  • status: accepted
  • Community's Parent: V.A.5.N.k
  • This Community's Level: Alliance
  • This Community's Children: [none]
Names:   Scientific: POA SECUNDA SEASONALLY FLOODED HERBACEOUS ALLIANCE
  Code: A.1410
  Common: Curly Bluegrass Seasonally Flooded Herbaceous Alliance
(convergence) and Synonyms:
(undetermined) Poa secunda Seasonally Flooded Herbaceous Alliance