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|Family: Papaveraceae||View Description||Dichotomous Key|
|Genus: Platystemon||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Platystemon californicus Benth.
Habit: Annual 3--30 cm, shaggy-hairy; sap colorless to orange. Leaf: basal and cauline, alternate and whorled, 1--9 cm, linear to lanceolate or narrowly oblong, entire. Inflorescence: axillary and terminal, 1-flowered; peduncle 3.4--26 cm, > leaves. Flower: buds nodding; sepals 3, hairy; petals 6, free, 6--19 mm, narrowly ovate to obovate, cream with yellow base, tip, or both (or all yellow), often persistent after flower; stamens > 12, free, filaments flat; carpels generally 9--18, fused, glabrous to densely long-hairy, separating in fruit. Fruit: 10--16 mm, ovoid to widely linear, generally narrowed between seeds, breaking transversely into 1-seeded, indehiscent units. Seed: 1 mm, elliptic to reniform, smooth, black.
Ecology: Open grassland, sandy soil, burns; Elevation: < 1000 m. Bioregional Distribution: CA-FP, w D; Distribution Outside California: to Oregon, Utah, Arizona, Baja California. Flowering Time: Mar--May Note: Highly variable; further study needed to determine if plants of southern ChI (Santa Barbara Island), described as Platystemon californicus var. ciliatus Dunkle, Santa Barbara Island cream cups, deserve taxonomic recognition.
Synonyms: Platystemon californicus var. ciliatus Dunkle; Platystemon californicus var. crinitus (Greene) Greene; Platystemon californicus var. horridulus (Greene) Jeps.; Platystemon californicus var. nutans Brandegee; Platystemon californicus var. ornithopus (Greene) Munz; Platystemon californicus var. sphaerocarpus Brandegee; Platystemon crinitus Greene
eFlora Treatment Author: Gary L. Hannan
Jepson Online Interchange
Previous taxon: Platystemon
Next taxon: Romneya
Citation for this treatment: Gary L. Hannan 2017. Platystemon californicus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=38664, accessed on March 25, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on March 25, 2017.