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Sporobolus cryptandrus - Aristida purpurea var. longiseta - Poa secunda Sandy Stream Terrace Grassland Alliance | NatureServe Biotics 2019
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Name: Sporobolus cryptandrus - Aristida purpurea var. longiseta - Poa secunda Sandy Stream Terrace Grassland Alliance Reference: NatureServe Biotics 2019 Description: The vegetation of this grassland alliance is characterized by a moderately dense graminoid layer dominated by <i>Sporobolus cryptandrus</i>. <i>Poa secunda</i> or <i>Aristida purpurea var. longiseta</i> often codominate the graminoid layer. <i>Hesperostipa comata</i> may be present in low abundance; <i>Pseudoroegneria spicata</i> is generally absent. Forb cover is typically low, but <i>Astragalus inflexus, Calochortus macrocarpus</i>, and <i>Heterotheca villosa</i> are often present. <i>Bromus tectorum</i> (and several other exotic species) is common. This grassland alliance is described for the Columbia Basin and lower Snake and Clearwater rivers in Oregon and Washington, and in the lowest elevations of Hells Canyon within the Blue Mountains in Idaho, and the Bighorn Basin in Montana. Stands occur on lower slopes, river terraces and alluvial bars on hot, dry sites. Sites are flat to gentle (to 30%) and occur on all aspects. Substrates are excessively drained soils with sand or sandy loam texture.  Accession Code: urn:lsid:vegbank.org:commConcept:39187-{BF5A4C41-27FE-48DE-902E-B3E4128FA35B} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 14-Mar-2014 to: ongoing
	status: accepted Community's Parent: Pleuraphis jamesii - Achnatherum hymenoides - Hesperostipa comata Semi-Desert Grassland Group This Community's Level: Alliance This Community's Children: Show/Hide   Aristida purpurea var. longiseta - Sporobolus cryptandrus Grassland   Sporobolus cryptandrus - Poa secunda Grassland   Sporobolus cryptandrus Shrub Grassland		Names:   UID: ELEMENT_GLOBAL.2.900028 NatureServe Explorer   Code: A3977   Translated: Sand Dropseed - Red Three-awn - Sandberg Bluegrass Sandy Stream Terrace Grassland Alliance   Common: Sandy Stream Terrace Sand Dropseed Grassland   Scientific: Sporobolus cryptandrus - Aristida purpurea var. longiseta - Poa secunda Sandy Stream Terrace Grassland Alliance