Cryptantha mariposae is an annual herb that is native to California, and endemic (limited) to California.
California Rare Plant Rank:
1B.3 (rare, threatened, or endangered in CA and elsewhere)
[wildflower.org] Characteristics, Habitat: Plant Characteristics
Duration: Annual
Habit: Herb
Fruit Type: Schizocarp
Size Notes: Up to about 10 inches tall.
Fruit: Nutlets, 2-4.
Bloom Information
Bloom Color: White , Yellow
Bloom Time: Apr , May , Jun
Distribution
USA: CA
Native Habitat: Rocky, semi-barren serpentine ridges, slopes, chaparral. (link added by Mary Ann Machi)