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Carex straminiformis Herbaceous Alliance | Western Ecology Working Group of...
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Name: Carex straminiformis Herbaceous Alliance Reference: Western Ecology Working Group of... Description: Stands included in this herbaceous alliance have been reported from subalpine meadows in the Sierra Nevada near Lake Tahoe at elevations from 2330-2850 m, but may occur at subalpine and montane elevations in the northwestern U.S. and the central Rocky Mountains. Climate is temperate with cool summers and cold winters with typically below freezing temperatures and deep snow. Mean annual precipitation is about 82 cm with dry summers. Stands occur on gently sloping sites on eastern aspects where snow accumulation is less and duration is moderate. Sites are relatively xeric, well-drained slopes with the water table well below 1 m from the surface. Total vegetation cover is sparse to up to 80% depending on the level of disturbance. Stands are dominated by Carex straminiformis. Other characteristic perennial graminoids include Elymus elymoides, Festuca viridula, Poa cusickii ssp. cusickii (= Poa hansenii), Achnatherum nelsonii (= Stipa nelsonii), Achnatherum lettermanii (= Stipa lettermanii), and Trisetum spicatum. Perennial forbs, such as Agoseris glauca var. monticola, Antennaria rosea, Lupinus sellulus var. lobbii, and Polygonum douglasii ssp. douglasii, are relatively sparse. Annual forbs are seasonally present especially on sites disturbed by small mammals. Species include Draba albertina, Cistanthe umbellata var. umbellata (= Calyptridium umbellatum), Gayophytum diffusum ssp. parviflorum, Linanthus harknessii, Mimulus leptaleus, and Polygonum douglasii ssp. douglasii. Adjacent vegetation includes open forest stands of Pinus contorta var. murrayana, Pinus albicaulis, Pinus monticola, Tsuga mertensiana, and Abies magnifica.  Accession Code: VB.CC.27405.CAREXSTRAMINIFO Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Carex straminiformis Herbaceous Alliance   Translated: Mount Shasta Sedge Herbaceous Alliance   UID: HIGHER_CLASS_UNIT.2.124538 NatureServe Explorer   Code: A.1314