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Ephedra (torreyana, viridis) / Mixed Semi-Desert Grasses Shrubland | NatureServe Biotics 2019
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Name: Ephedra (torreyana, viridis) / Mixed Semi-Desert Grasses Shrubland Reference: NatureServe Biotics 2019 Description: This shrubland association is currently described from Grand Canyon National Park and Grand Canyon-Parashant National Monument in Arizona. More survey and classification work are needed to fully characterize this type. It typically occurs on sideslopes at 950 to 1400 m (3125-4600 feet) elevation, but can be found as low as 775 m (2600 feet). It is primarily found on moderate gradients (15-22°) and southern aspects, but is also occasionally found on steeper slopes (30-35°). Soils are rapidly-drained silty or sandy loams. Vegetation is characterized by the dominance of the short shrub <i>Ephedra torreyana</i> together with a well-developed mixed-species graminoid understory. Tall shrubs are absent. The short-shrub layer also occasionally includes <i>Encelia resinifera, Rhus trilobata</i>, and <i>Ephedra viridis</i>. <i>Gutierrezia sarothrae</i> and <i>Opuntia polyacantha</i> are common components of the dwarf-shrub stratum. A rich and varied graminoid understory that includes <i>Muhlenbergia porteri, Bouteloua eriopoda</i>, and <i>Tridens muticus</i> characterizes this association. <i>Pleuraphis jamesii</i> occasionally occurs, as do <i>Achnatherum speciosum, Dasyochloa pulchella</i>, and <i>Aristida purpurea</i>. The non-native <i>Bromus rubens</i> also occurs in most stands. <i>Sphaeralcea grossulariifolia, Artemisia ludoviciana, Eriogonum inflatum</i>, and <i>Acourtia wrightii</i> occasionally occur in the forb understory.  Accession Code: urn:lsid:vegbank.org:commConcept:33878-{17AA18D5-ADCB-4ADE-8AC3-8404135A5DE3} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 29-Jul-2010 to: ongoing
	status: accepted Community's Parent: Ephedra torreyana Shrubland Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.840571 NatureServe Explorer   Code: CEGL005113   Translated: (Torrey's Joint-fir, Mormon-tea) / Mixed Semi-Desert Grasses Shrubland   Scientific: Ephedra (torreyana, viridis) / Mixed Semi-Desert Grasses Shrubland (convergence) and Synonyms: (similar) Ephedra (torreyana, viridis) / Mixed Semi-Desert Grasses Shrubland