Crossosoma [Crossosoma bigelovii S. Watson]

Crossosoma [Crossosoma bigelovii S. Watson]

Listing CNPS Unlisted R-E-D Code None

State/Federal. Status -- None CROSSOSOMATACEAE Feb.-Apr.

Global Rank None State Rank None

Distribution: San Diego County, Imperial County, Riverside County, and San Bernardino County; Arizona; Nevada; Baja California, Mexico.

Habitat: Sonoran Desert Scrub, typically growing in rock on canyon walls is the general habitat utilized by this small shrub. Soils are mapped as Acid Igneous rock land at the Borrego Palm Canyon site.

Known Sites: Crossosoma is uncommon in Borrego Palm Canyon on Anza-Borrego State Park lands growing on a partially shaded, steep rocky slope. In Dry Morongo Wash in Riverside County east of the Coachella Valley and west of Morongo it is more widely dispersed, growing in more open locales, but still on relatively steep, rocky slopes.

Status: Crossosoma populations are likely stable on the southern deserts based on limited historical impacts to its canyonlands habitat. Although apparently more common elsewhere to the east, populations on the western periphery of the Colorado Desert are uncommon and should be protected.

Copyright May 1994 Craig H. Reiser.

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