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Sphaeromeria argentea - Achnatherum swallenii Alpine Sparse Meadow | NatureServe Biotics 2019
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Name: Sphaeromeria argentea - Achnatherum swallenii Alpine Sparse Meadow Reference: NatureServe Biotics 2019 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, <i>Sphaeromeria argentea</i>, is a broad-leaved suffrutescent perennial forb less than 0.2 m in height. The perennial bunchgrass <i>Achnatherum swallenii</i> is the most common graminoid and is usually up to 0.4 m in height. Other forbs occurring include <i>Phlox hoodii ssp. muscoides, Ionactis alpina</i>, and <i>Penstemon pumilus</i>.  Accession Code: urn:lsid:vegbank.org:commConcept:30902-{8FC49B5C-EDA7-4625-A45C-FEF7C63E0E0C} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 01-Sep-2004 to: ongoing
	status: accepted Community's Parent: Rocky Mountain Alpine Sparse Herb Bedrock & Scree Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.689768 NatureServe Explorer   Code: CEGL001993   Translated: Silver Chicken-sage - Swallen's Needlegrass Alpine Sparse Meadow   Scientific: Sphaeromeria argentea - Achnatherum swallenii Alpine Sparse Meadow (convergence) and Synonyms: (similar) Sphaeromeria argentea - Achnatherum swallenii Herbaceous Vegetation (similar) CEGL001993 (similar) Sphaeromeria argentea - Achnatherum swallenii Herbaceous Vegetation