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Poa secunda Seasonally Flooded Herbaceous Alliance | Western Ecology Working Group of...
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Name: Poa secunda Seasonally Flooded Herbaceous Alliance Reference: Western Ecology Working Group of... 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.18935.POASECUNDASEASO Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Poa secunda Seasonally Flooded Herbaceous Alliance   Translated: Curly Bluegrass Seasonally Flooded Herbaceous Alliance   UID: HIGHER_CLASS_UNIT.2.126623 NatureServe Explorer   Code: A.1410