Eschscholzia rhombipetala Greene

Plants annual, caulescent, erect, 5-30 cm, glabrous. Leaves basal and cauline; blade glabrous; ultimate lobes generally obtuse. Inflorescences cymose or 1-flowered; buds erect or nodding. Flowers: receptacle turbinate to obconic, distally translucent and somewhat swollen, more than 2 mm broad, cup without spreading free rim; calyx acute or acuminate, glabrous, sometimes glaucous; petals yellow, 3-15 mm. Capsules 4-7 cm. Seeds black, spheric, 1.3-1.8 mm, reticulate.