Eschscholzia rhombipetala

Diamond-petaled california poppy

Family: Papaveraceae · Type: annual · Native

Conservation status: CNPS 1B.1

Diamond-petaled california poppy is a rare (CNPS 1B.1) California native annual found in western San Joaquin Valley and eastern San Francisco Bay Area in fallow fields, grasslands, and open places at elevations below 300 meters. Flowering from March to April, this plant produces yellow flowers 3 to 6 millimeters long that typically fall on the first day of blooming. Growing 5 to 20 centimeters tall with an erect, glabrous stem, it emerges as a delicate and slender annual. Its leaves have obtuse segments, creating a soft, understated green texture across the plant. The fruit reaches 4 to 7 centimeters long, containing round black seeds with distinctive net-ridged surfaces.

Habitat: Fallow fields, open places, grasslands, in loose soils

Bloom period: Mar-Apr

Elevation: < 300 m

Bioregions: w SnJV (Carrizo Plain, San Luis Obispo Co.), e SnFrB (Corral Hollow, Alameda Co.) (Formerly known also from NCoRI, e SCoRO, SCoRI).

California counties: Kern, Monterey, San Luis Obispo, Alameda, Colusa, Stanislaus, Contra Costa, San Joaquin

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Jepson eFlora, Cal-IPC, and more.