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Pleuraphis rigida Grassland | NatureServe Biotics 2019
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Name: Pleuraphis rigida Grassland Reference: NatureServe Biotics 2019 Description: This grassland 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 predominantly occurs on sideslopes, but also sometimes occurs in drainage channels and on valley bottoms, mesas, and plateaus from approximately 1050 to 1600 m (3420-5250 feet) elevation, but has been found as low as 470 m (1540 feet). It is typically found on flat to gently sloping gradients (0-5°), but also occurs on moderately steep slopes (15-30°) as well. Soils are well- to rapidly-drained sandy clays or loams that occasionally contain silt. The underlying geology is usually limestone. Tree and tall shrubs are essentially absent from this graminoid-dominated community type. A relatively sparse short-shrub layer occurs, in which <i>Coleogyne ramosissima</i> and <i>Ephedra aspera</i> occur most frequently. <i>Opuntia polyacantha</i> and <i>Gutierrezia</i> spp. are commonly seen in a sparse dwarf-shrub stratum. A well-developed graminoid layer dominated by <i>Pleuraphis rigida</i> characterizes this association. The invasive grass <i>Bromus rubens</i> also occurs on a regular basis, while the native perennials <i>Bouteloua eriopoda</i> and <i>Aristida purpurea</i> occur sporadically. Species such as <i>Sphaeralcea grossulariifolia</i> and <i>Erodium cicutarium</i> are common in the forb understory.  Accession Code: urn:lsid:vegbank.org:commConcept:31945-{B427608F-2624-4565-8405-6E5A3223E27D} 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: Pleuraphis rigida Desert Grassland Alliance This Community's Level: Association This Community's Children: [none]		Names:   UID: ELEMENT_GLOBAL.2.683692 NatureServe Explorer   Code: CEGL003051   Translated: Big Galleta Grassland   Scientific: Pleuraphis rigida Grassland (convergence) and Synonyms: (similar) CEGL003051 (similar) Pleuraphis rigida Herbaceous Vegetation [Placeholder] (similar) Pleuraphis rigida Herbaceous Vegetation