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Canotia holacantha Grand Canyon Shrubland | NatureServe Biotics 2019
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Name: Canotia holacantha Grand Canyon Shrubland Reference: NatureServe Biotics 2019 Description: This crucifixion-thorn shrubland association is currently described from Grand Canyon National Park in Arizona. More survey and classification work are needed to fully characterize this type. It occurs on sideslopes of canyons typically from 575 to 975 m (1875-3625 feet) elevation, but it has been found as high as 1275 m (4150 feet). It usually occurs on north-facing, moderately-sloping gradients (15-25°), but occasionally occurs on very steep slopes (40-50°) as well. Soils are rapidly-drained sandy loams; the underlying geology is usually limestone. This community often occurs in protected areas with a relatively high cover of moss. This community is characterized by a tall-shrub layer dominated by <i>Canotia holacantha</i>, which is invariably accompanied by the short shrub <i>Ephedra aspera</i> and occasionally by <i>Acacia greggii</i>. A variety of dwarf-shrubs also occur, including <i>Gutierrezia microcephala, Echinocereus</i> sp., <i>Agave utahensis</i>, and <i>Encelia farinosa</i>. A sparse graminoid layer is usually present, in which <i>Bromus rubens</i> occurs most frequently. The perennial grasses <i>Muhlenbergia porteri</i> and <i>Tridens muticus</i> also occur from time to time. <i>Sphaeralcea grossulariifolia</i> and <i>Xylorhiza tortifolia</i> are the most common forbs in a relatively sparse forb layer. Moss occurs sporadically, but when present has significant cover.  Accession Code: urn:lsid:vegbank.org:commConcept:34059-{5EFB7C0D-CC87-429A-970D-54C1B7242C91} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 30-Jul-2010 to: ongoing
	status: accepted Community's Parent: Simmondsia chinensis - Canotia holacantha - Eriogonum fasciculatum Desert Scrub Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.840828 NatureServe Explorer   Code: CEGL005296   Translated: Crucifixion-thorn Grand Canyon Shrubland   Scientific: Canotia holacantha Grand Canyon Shrubland (convergence) and Synonyms: (similar) Canotia holacantha Grand Canyon Shrubland