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Elymus lanceolatus - Hesperostipa comata - Phacelia hastata Central Rocky Mountain Sand Deposit Grassland Alliance | NatureServe Biotics 2019
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Name: Elymus lanceolatus - Hesperostipa comata - Phacelia hastata Central Rocky Mountain Sand Deposit Grassland Alliance Reference: NatureServe Biotics 2019 Description: The vegetation of this grassland alliance is characterized by a sparse to moderately dense herbaceous layer dominated by the medium-tall perennial graminoid <i>Elymus lanceolatus</i> with <i>Hesperostipa comata</i> or <i>Phacelia hastata</i> present to codominant. <i>Elymus lanceolatus</i> binds the loose sand providing 5-25% cover. Other associated species include shrubs such as <i>Ericameria nauseosa, Tetradymia canescens</i>, grasses <i>Achnatherum hymenoides, Poa secunda</i>, and forbs <i>Astragalus sclerocarpus, Eriogonum ovalifolium var. purpureum, Linum perenne, Oenothera pallida, Phlox longifolia</i>, and <i>Psoralidium tenuiflorum</i>. Non-native species include <i>Bromus tectorum, Centaurea diffusa, Sisymbrium altissimum</i>, and <i>Salsola kali</i>. This alliance occurs in the Centennial Valley Sandhills in southwestern Montana and sandy plains along the Columbia River. Stands found in a high and cold Centennial Valley are at 2000-2135 m elevation and occur in a mosaic with active sand dunes and dune shrublands with occurrences less than one acre in size. Along the Columbia River, stands range from 300-765 m elevation. Sites are level to moderately sloping sandy plains and low dunes. Soils are deep loess or sand. Disturbance is important to the maintenance of these seral communities, and it is associated with recent blowouts.  Accession Code: urn:lsid:vegbank.org:commConcept:39195-{E04F0626-B240-475F-AF99-52FBA9C2D999} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 29-Sep-2016 to: ongoing
	status: accepted Community's Parent: Festuca campestris - Festuca idahoensis - Pseudoroegneria spicata Central Rocky Mountain Foothill Grassland Group This Community's Level: Alliance This Community's Children: Show/Hide   Elymus lanceolatus - Hesperostipa comata Grassland   Elymus lanceolatus - Lupinus argenteus Grassland   Elymus lanceolatus - Phacelia hastata Grassland		Names:   UID: ELEMENT_GLOBAL.2.900036 NatureServe Explorer   Code: A3985   Translated: Streambank Wheatgrass - Needle-and-Thread - Silverleaf Scorpionweed Central Rocky Mountain Sand Deposit Grassland Alliance   Common: Central Rocky Mountain Sand Deposit Grassland   Scientific: Elymus lanceolatus - Hesperostipa comata - Phacelia hastata Central Rocky Mountain Sand Deposit Grassland Alliance