Trans. Hort. Soc. London, ser. 2, 1: 408. 1835
Plants annual, caulescent, erect, 5-30 cm, sparsely pubescent. Leaves basal and cauline; blade with ultimate lobes usually obtuse. Inflorescences cymose or 1-flowered; buds nodding. Flowers: receptacle turbinate, less than 1.5 mm broad, cup without spreading free rim; calyx acute, pubescent; petals yellow, sometimes with orange spot at base, 10-20 mm. Capsules 3-7 cm. Seeds brown, spheric to ellipsoid, 1-1.3 mm, reticulate. 2n = 12.
Phenology: Flowering spring (Mar–May).
Habitat: Grassy areas in woodland, chaparral
Elevation: 500-1500 m