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Geum rossii - Minuartia obtusiloba Herbaceous Vegetation | Western Ecology Working Group of...
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Name: Geum rossii - Minuartia obtusiloba Herbaceous Vegetation Reference: Western Ecology Working Group of... Description: This alpine plant association has been documented from southwestern Montana in the East Pioneer and Tobacco Root ranges and the Front Range of north-central Colorado. Stands are common on exposed, windswept upper slopes, slope shoulders, saddles and ridgetops. Typically extreme winds create a deflation surface with bare ground and gravel and rock comprising between 35 and 90% cover. Soils are slightly acidic, have 35-70% coarse fragments, and are predominantly well-drained sandy loams, loams or sand. Stands are found on thin soils weathered from crystalline parent materials including granite. The vegetation is characterized by an open to moderately dense (30-50% cover) low herbaceous layer dominated by <i>Geum rossii</i> and cushion plants with virtually no dwarf-shrub component and a reduced graminoid component. Mean forb cover is 30% with <i>Geum rossii</i> and <i>Minuartia obtusiloba</i> being 100% constant and together constituting about one-quarter to one-half of the total forb cover. Other common forbs are <i>Castilleja occidentalis, Eritrichium nanum, Phlox pulvinata, Douglasia montana, Polygonum viviparum, Silene acaulis, Tonestus pygmaeus</i>, and <i>Trifolium dasyphyllum</i>. <i>Selaginella densa</i> and <i>Selaginella watsonii</i> are locally abundant. Graminoids have low coverage, although some have high constancy and include <i>Carex elynoides, Carex rupestris var. drummondiana, Festuca brachyphylla (= Festuca ovina), Luzula spicata, Poa arctica</i>, and <i>Poa glauca</i>. This cushion plant/fell-field community is identified by the dominance of the diagnostic species <i>Geum rossii</i> and <i>Minuartia obtusiloba</i>, which sets it apart from other cushion plant communities.  Accession Code: VB.CC.33843.CEGL001965 Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 17-Nov-2014 to: 01-May-2019
	status: accepted This Community's Level: association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.685934 NatureServe Explorer   Translated: Ross' Avens - Twin-flower Sandwort Herbaceous Vegetation   Scientific: Geum rossii - Minuartia obtusiloba Herbaceous Vegetation   Code: CEGL001965