Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.



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.


Perennial; hairs generally ± 5–15 mm; taproot stout; sap colorless
Leaves generally basal, obovate or wedge-shaped; teeth rounded
Inflorescence: flowers solitary, terminal
Flower: bud nodding; sepals 2–3, long-hairy; petals 4 or 6, free, obovate, white or yellow, generally persistent after pollination; stamens many, free; placentas 3–6, style 1, stigma lobes 3–6
Fruit ovate to oblong, dehiscent from tip
Seeds few, oblong, wrinkled, black
Species in genus: 3 species: sw US
Etymology: (Greek: bear poppy, from long hairs)


A. merriamii Coville


Perennial 2–5 dm
Stem glaucous
Leaf 25–75 cm
Flower: sepals 15–20 mm; petals 25–40 mm, white
Fruit 25–35 mm
Seeds 1.5–2 mm
Ecology: Rocky slopes
Elevation: 900–1400 m.
Bioregional distribution: ne Mojave Desert
Distribution outside California: s Nevada
Flowering time: Apr–May
A. californica Torr. & Frémont (petals yellow) in sw NV, undocumented in CA.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for ARCTOMECON%20merriamii 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 Arctomecon merriamii
Retrieve dichotomous key for Arctomecon
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
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