Peirson's Pincushion [Chaenactis carphoclinia Gray var. peirsonii (Jeps.) Munz]
Listing CNPS List 1B R-E-D Code 2-1-3
State/Federal. Status -- None ASTERACEAE Mar.-Apr.
Global Rank G5T1 State Rank S1.3
Distribution: San Diego County, Riverside County, Imperial County
Habitat: This annual grows in open Sonoran Desert Scrub with very limited competition from perennial shrubs. Along the Salton Seaway, a population was observed on a broken, rocky substrate in relatively flat terrain; soils here were shallow.
Known Sites: Populations are concentrated along the Salton Seaway and rugged terrain to the north in the Santa Rosa Mountains. Reported sites include Benson Dry Lake, Silent Canyon, and Palm Wash.
Status: Peirson's Pincushion is presumed stable, with its reported range concentrated in an historically little developed desert region. Much of its range is within protected federal lands, on rugged, relatively undevelopable terrain. Additional taxonomic analysis is recommended to demonstrate this entity merits varietal status. It's tripinnatifid leaves are primarily restricted to a basal cluster, differentiating it from common varieties of this white-flowering pincushion.
Copyright © May 1994 Craig H. Reiser.
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