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Yucca brevifolia Wooded Herbaceous Alliance | Western Ecology Working Group of...
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Name: Yucca brevifolia Wooded Herbaceous Alliance Reference: Western Ecology Working Group of... Description: These extremely xeromorphic, succulent wooded grasslands of the Mojave Desert and southeastern Great Basin are found on alluvial fans, gentle to moderate slopes and ridgetops. Soil types and elevation limit the distribution of the vegetation. Soils are derived from colluvial or alluvial deposits and have variable textures, ranging from gravel or coarse sand to fine silt. Some stands have bimodal soils with both coarse- and fine-textured layers. The vegetation is characterized by an emergent (up to 13 m tall) and typically abundant Yucca brevifolia layer over a perennial graminoid-dominated understory layer. Yucca brevifolia must be evenly distributed with over 1% total cover (Keeler-Wolf and Thomas 2000). Emergent Pinus monophylla or Juniperus spp. may be present, but have less than 1% cover. Graminoid species may include Achnatherum hymenoides, Achnatherum speciosum, Muhlenbergia porteri, Pleuraphis jamesii (above 1400 m), Pleuraphis rigida, or Poa secunda. Scattered short shrubs and dwarf-shrubs (<2 m tall) are usually present and may form an intermittent canopy. They are usually associated with disturbance and include Ambrosia dumosa, Ericameria spp., Eriogonum fasciculatum, Gutierrezia microcephala, Hymenoclea salsola, Krascheninnikovia lanata, Lycium andersonii, Opuntia acanthocarpa, Sphaeralcea ambigua, or Yucca baccata. Forb cover is mostly from seasonal annuals.  Accession Code: VB.CC.18863.YUCCABREVIFOLIA Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 28-Jun-2001 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Yucca brevifolia Wooded Herbaceous Alliance   Translated: Joshua Tree Wooded Herbaceous Alliance   UID: HIGHER_CLASS_UNIT.2.125396 NatureServe Explorer   Code: A.2527