Plants annual, scapose, erect, 5-25 cm, glabrous, sometimes glaucous. Leaves basal; blade with ultimate lobes acute. Inflorescences 1-flowered; buds nodding or sometimes erect. Flowers: receptacle conic, cup without spreading free rim; calyx acuminate, glabrous, sometimes glaucous; petals yellow, (10-)12-25 mm. Capsules 4-7 cm. Seeds tan to brown, spheric, 1.2-1.8 mm, minutely pitted. 2n = 14.
Phenology: Flowering spring (Mar–May).
Habitat: Desert washes, flats, slopes
Elevation: 50-1500 m
Ariz., Calif., Nev., Utah.
Eschscholzia glyptosperma is known from the Mojave and Sonoran deserts.