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Nassella cernua Herbaceous Alliance | Western Ecology Working Group of...
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Name: Nassella cernua Herbaceous Alliance Reference: Western Ecology Working Group of... Description: This once-extensive bunchgrass alliance of California's valleys and foothills occurs on deep soils with a high clay content. Stands can occur on all topographic positions, but due to climatic factors, they do not occur over 1400 m of elevation. The native California bunch grasses are adapted to a Mediterranean climate with moist, cool winters and long, dry summers. Precipitation varies from 25-70 cm per year, and falls mostly between November and April. Stands typically include many exotic annual grasses. This native California bunchgrass alliance is dominated by Nassella cernua. Other graminoids present may include Elymus glaucus, Festuca californica, Melica californica, Leymus triticoides, Nassella lepida, Nassella pulchra, Aristida ternipes, Koeleria macrantha, and Poa secunda. Many exotic annuals, such as Bromus diandrus, Bromus madritensis, Bromus hordeaceus, Avena barbata, Avena fatua, and Lolium perenne ssp. multiflorum (= Lolium multiflorum), have invaded stands of this alliance. Emergent trees and shrubs may be present, particularly the oak Quercus douglasii. Plant cover tends to be open.  Accession Code: VB.CC.22011.NASSELLACERNUAH 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: Nassella cernua Herbaceous Alliance   Translated: Nodding Needlegrass Herbaceous Alliance   UID: HIGHER_CLASS_UNIT.2.126429 NatureServe Explorer   Code: A.1247