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Sphaeromeria argentea - Achnatherum swallenii Herbaceous Vegetation | Western Ecology Working Group of...
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Name: Sphaeromeria argentea - Achnatherum swallenii Herbaceous Vegetation Reference: Western Ecology Working Group of... Description: This association is found in the mountains of central Idaho, where it occurs on alluvial fans at elevations from approximately 1890 to 1980 m (6200-6500 feet). These fans are a complex of interlayered materials consisting of boulders, cobbles, and pebbles mixed with sand, silt, and clay. The soils are highly variable, in some sites derived from sand and in others derived from clay. Most of the ground surface is covered by a cobble or boulder pavement, resulting from the removal of fine-grained materials by wind and surface runoff. The soils associated with this vegetation type occur on alluvial flats and are dry gravelly loams, with shallow rooting depths and a windswept surface. A low and sparsely vegetated appearance is characteristic of this association, similar to windswept tundra vegetation. The dominant species, Sphaeromeria argentea (= Tanacetum nuttallii), is a broad-leaved suffrutescent perennial forb less than 0.2 m in height. The perennial bunchgrass Achnatherum swallenii (= Oryzopsis swallenii) is the most common graminoid and is usually up to 0.4 m in height. Other forbs occurring include Phlox hoodii ssp. muscoides (= Phlox muscoides), Ionactis alpina (= Aster scopulorum), and Penstemon pumilus.  Accession Code: VB.CC.27430.SPHAEROMERIAARG Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 17-Nov-2014
	status: accepted Community's Parent: Sphaeromeria argentea Herbaceous Alliance This Community's Level: Association This Community's Children: [none]		Names:   Translated: Nuttall's False Sagebrush - Swallen's Mountain Ricegrass Herbaceous Vegetation   UID: ELEMENT_GLOBAL.2.689768 NatureServe Explorer   Code: CEGL001993   Scientific: Sphaeromeria argentea - Achnatherum swallenii Herbaceous Vegetation (convergence) and Synonyms: (undetermined) Sphaeromeria argentea - Achnatherum swallenii Herbaceous Vegetation