Regularity: Regularly occurring
Global Range: Utah (soutwest Beaver, west Iron, Washington, and Kane Counties), adjacent Nevada (to Sheep Range), south throughout most of Arizona and east to southwest Colorado and western New Mexico.
Catalog Number: US 95269
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Status verified from secondary sources
Preparation: Pressed specimen
Collector(s): C. C. Parry, J. M. Bigelow, C. Wright & A. C. V. Schott
Locality: Collected chiefly in the Valley of the Rio Grande, below Doñana., Texas, United States, North America
- Possible Syntype: Gray, A. 1859. Rep. U.S. Mex. Bound. Surv. 2 (1): 112.
Comments: Sandy or sometimes clay soils in sagebrush, scrub oak, pinyon-juniper, and ponderosa pine communiteies, 1200-2300 m elev. Mountains and plateaus.
National NatureServe Conservation Status
Rounded National Status Rank: NNR - Unranked
Names and Taxonomy
Comments: Arizona is the center of greatest diversity in this variable species, which comprises many subspecies that are both geographically and morphologically separable but intergrade at their points of contact. Kearney & Peebles (1951) give 4 subspecies and 1 variety Cronquist et al. (1984) give 3 varities.
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