NatureServe Conservation Status
Rounded Global Status Rank: G2 - Imperiled
Reasons: Known only from western San Luis Obispo County, California and restricted to a particular substrate. The species is very locally abundant but potential habitat has been reduced by development to about one-third of its estimated historic level. Half of the remaining habitat is in small patches in and around developed areas; half is more continuous and supports dense stands (over 50 percent cover) of this species.