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Juncus parryi / Sibbaldia procumbens Alpine Snowbed | NatureServe Biotics 2019
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Name: Juncus parryi / Sibbaldia procumbens Alpine Snowbed Reference: NatureServe Biotics 2019 Description: This alpine association has been described from northwestern Montana in Glacier National Park and adjacent Waterton Lakes National Park, Alberta, Grand Teton National Park in northwestern Wyoming, and Rocky Mountain National Park in Colorado in high subalpine and low alpine zones. It occurs predominantly on gently rolling to moderately steep glaciated terrain, often associated with depressions and broad saddles. Where it occurs on moderate to steep slopes, it is associated with areas where snow collects during the winter (lee slopes). Moderately well-drained to rapidly drained soils are derived from a wide variety of sedimentary parent materials. Ground cover is variable, with northern Rocky Mountain stands being mostly rock-free with an average of about 4% exposed soil, and litter cover varies widely with a modal value around 45 to 50%. Lichen and bryophyte cover is also highly variable, ranging from nil to 85%. Central and southern Rocky Mountain stands are mostly open and rocky, with exposed bare soil accounting for 5-20% of the ground surface and an additional 15-30% covered with large and small rock. Moss and lichen, when present, can cover up to 15% of the ground surface. The vegetation cover is characterized by a moderately dense to dense herbaceous layer dominated by <i>Juncus parryi</i> and <i>Sibbaldia procumbens</i>. Other important species include <i>Antennaria parvifolia, Carex paysonis, Carex rupestris var. drummondiana, Danthonia intermedia, Poa cusickii ssp. epilis</i>, and <i>Viola labradorica</i>, though none of these species is consistently found with high cover.  Accession Code: urn:lsid:vegbank.org:commConcept:34525-{A2D850D0-BCB1-4AAD-AAD3-368CD4CBC64A} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 16-Aug-2005 to: ongoing
	status: accepted Community's Parent: Juncus drummondii - Juncus parryi - Sibbaldia procumbens Rocky Mountain Alpine Snowbed Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.730760 NatureServe Explorer   Code: CEGL005871   Translated: Parry's Rush / Creeping Sibbaldia Alpine Snowbed   Scientific: Juncus parryi / Sibbaldia procumbens Alpine Snowbed (convergence) and Synonyms: (similar) Juncus parryi / Sibbaldia procumbens Herbaceous Vegetation (similar) Juncus parryi / Sibbaldia procumbens Herbaceous Vegetation