I took a 5-hour, 5-mile hike on the Doe Flat Trail. I'm dividing my observations on those in the Del Norte County versus Siskiyou County portions of the hike. Much of the terrain on the Del Norte County part of the hike was on serpentine outcrops.
The small leaves and elevation point to this species. Munz & Keck (1959) assign this population to variety torreyi.