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Yucca glauca Prairie Scrub Alliance | NatureServe Biotics 2019
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Name: Yucca glauca Prairie Scrub Alliance Reference: NatureServe Biotics 2019 Description: This alliance includes stands of herbaceous vegetation with a sparse shrub layer growing on caliche, sandstone outcrops and sandy soils in the northwestern Great Plains. Elevations range from 1100-1850 m. In the western Great Plains, precipitation occurs mostly in the spring. Summers are hot and dry, except for locally occurring, high-intensity convective storms. Stands typically occur along ridgetops and upper slopes, on sandstone or scoria outcrops and probably on stabilized sand dunes as well. Soils in some cases are residual and relatively deep, with genetic horizons. Texture varies from nearly pure sand on the surface to medium-textured and medium-coarse-textured at depth. Stands of this alliance contain an open to moderately dense (at least 10% cover), low-shrub layer above a species-rich herbaceous layer. Dominance of the shrub layer by <i>Yucca glauca</i> is characteristic (cover ranging from 5-15%). <i>Artemisia tridentata ssp. wyomingensis</i> and <i>Artemisia cana ssp. cana</i> may be present but are sparse and contribute little cover. In the herbaceous layer, <i>Hesperostipa comata</i> and <i>Calamovilfa longifolia</i> are the most abundant and constant species, and <i>Bouteloua gracilis, Schizachyrium scoparium</i>, and <i>Carex filifolia</i> often are present but contribute much less cover than do <i>Hesperostipa</i> or <i>Calamovilfa</i>. <i>Pseudoroegneria spicata</i> is dominant in some stands. Forbs are common but contribute little cover; <i>Artemisia frigida</i> has the highest constancy, but no forbs are characteristic of the alliance. Litter covers can be high, up to 50% of the ground surface, and bare soil covers the rest of the ground surface.  Accession Code: urn:lsid:vegbank.org:commConcept:38248-{C33EA914-998F-45B0-BE0F-6B14E6741EBD} Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 18-Dec-2014 to: ongoing
	status: accepted Community's Parent: Artemisia filifolia / Calamovilfa longifolia - Yucca glauca Sand Shrubland Group This Community's Level: Alliance This Community's Children: Show/Hide   Yucca glauca / Calamovilfa longifolia Shrub Grassland   Yucca glauca / Pseudoroegneria spicata Shrub Grassland		Names:   UID: ELEMENT_GLOBAL.2.899151 NatureServe Explorer   Code: A1540   Translated: Soapweed Yucca Prairie Scrub Alliance   Common: Great Plains Soapweed Yucca Prairie Scrub   Scientific: Yucca glauca Prairie Scrub Alliance (convergence) and Synonyms: (similar) A.1540 (similar) Yucca glauca Shrub Herbaceous Alliance