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©Copyright 1993 by the Regents of the University of California
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Curtis Clark

Annual to small tree; sap often colored, often milky
Leaves basal, cauline, or both, generally toothed, lobed, or dissected; cauline generally alternate; stipules 0
Inflorescence: cyme, raceme, or panicle (terminal), or flower solitary
Flower bisexual, generally radial; sepals 2–4, sometimes shed ± at flower; petals generally 4 or 6 (or more), sometimes in 2 unlike pairs; stamens 4–many; ovary generally 1, superior, chamber generally 1, stigma lobes 0–many, ovules 1–many
Fruit: generally capsule, dehiscent by valves or pores, generally septicidal
Genera in family: 40 genera, 400 sp.: n temp, n tropical, s Africa; some cultivated (Papaver, Dicentra, Eschscholzia ). Petal length includes any spur or pouch. Hunnemannia fumariifolia Sweet (Eschscholzia-like garden per with free sepals) an uncommon waif in CA. Corydalis, Dicentra, Fumaria formerly treated in Fumariaceae.


Species in genus: 1 sp
Etymology: (Greek: wide stamen)


P. californicus Benth.


Annual 10–30 cm, shaggy-hairy; sap colorless
Leaves basal and cauline, opposite, 2–8 cm, linear to lanceolate or narrowly oblong, entire
Inflorescence: flowers solitary, terminal; peduncle 10–20 cm
Flower: sepals 3, hairy; petals 6, free, elliptic, white to yellowish, 8–16 mm, persistent after pollination; stamens > 12, free, filaments flattened; longitudinal ovary segments (carpels) generally 9–18, fused, separating in fruit
Fruit: segments 10–16 mm, linear, narrowed between seeds, breaking into 1-seeded units
Seed 1 mm, elliptic to reniform, smooth, brown
Ecology: Open grasslands, sandy soils, burns
Elevation: < 1000 m.
Bioregional distribution: California Floristic Province, w Desert
Distribution outside California: to Oregon, Utah, Arizona, Baja California
Flowering time: Mar–May
Highly variable
Synonyms: vars. crinitus Greene, horridulus Greene, nutans Brandegee, and ornithopus (Greene) Munz
Plants of s ChI (Santa Barbara Island) have been called var. ciliatus Dunkle, Santa Barbara Island cream cups
Horticultural information: DRN, DRY, SUN: 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24.

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bioregional map for PLATYSTEMON%20californicus being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Platystemon californicus
Retrieve dichotomous key for Platystemon
Overlay Consortium of California Herbaria specimen data by county on this map
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