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Gary L. Hannan & Curtis Clark, except as noted

Annual to small tree; sap colorless, yellow, orange, red, or white. Leaf: basal, cauline, or both, simple and entire, toothed, or lobed, or 1–3-pinnate-dissected or compound; cauline generally alternate; stipules 0. Inflorescence: terminal, 1-flowered or cyme, raceme, or panicle; bracts generally present. Flower: bisexual, radial, bilateral, or biradial; sepals 2–3, shed after flower; petals generally 2 × sepals in number; stamens generally many; ovary 1, superior, chamber 1, style 0 or 1, stigmas or lobes 2–many, ovules few to many. Fruit: capsule, dehiscent by valves or pores, ± nut, or breaking transversely into 1-seeded, indehiscent units. Seed: fleshy appendage generally 0.
25–30 genera, 200 species: northern temperate, northern tropics; some cultivated (Papaver, Eschscholzia, Hunnemannia), source of opiates. Stylomecon moved to Papaver. Corydalis, Dicentra, Fumaria in Fumariaceae in FNANM, elsewhere. Glaucium flavum Crantz is a waif. According to FNANM (3:300–301), Hunnemannia fumariifolia Sweet (± like Eschscholzia except sepals free) an occasional waif in California, but documentation evidently lacking. Fleshy appendage of seed sometimes for dispersal by ants. —Scientific Editor: Thomas J. Rosatti.

Key to Papaveraceae

Perennial herb; hairs generally ± 5–15 mm; taproot stout; sap colorless or yellow. Leaf: generally basal, obovate or wedge-shaped, long white-hairy; teeth rounded. Inflorescence: terminal, 1-flowered. Flower: bud nodding; sepals 2–3, long-hairy; petals 4 or 6, free, obovate, white [yellow], generally persistent after flower; stamens many, free; placentas 3–6, style 1, stigma lobes 3–6. Fruit: ovate to oblong, dehiscent from tip. Seed: few, oblong, wrinkled, black; aril present; fleshy appendage present.
3 species: southwestern United States. (Greek: bear poppy, from long hairs)

A. merriamii Coville WHITE BEAR POPPY
Plant 2–5 dm. Stem: glaucous. Leaf: 2.5–12 cm. Flower: sepals 3, 15–20 mm; petals 6, 25–40 mm. Fruit: 25–40 mm. Seed: 1.5–2 mm.
Rocky slopes; 800–1600 m. ne Mojave Desert; southern Nevada. Apr–May [Online Interchange] {CNPS list}
Unabridged note: Arctomecon californica Torr. & Frém. (sepals 3, glabrous; petals 6, yellow) in southwestern Nevada, northern Arizona, but undocumented for California.

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Nov 26 2015
Citation for this treatment: [Author of taxon treatment] 2013. Arctomecon, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Nov 26 2015

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click for enlargement Arctomecon merriamii
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Gerald and Buff Corsi © 2000 California Academy of Sciences

Geographic subdivisions indicated for the distribution of Arctomecon merriamii Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.