Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©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.


Annual, perennial herb; sap white or yellow, milky
Leaves basal and cauline, deeply pinnately lobed, glabrous or hairy, sometimes glaucous
Inflorescence: flowers solitary, terminal
Flower: bud nodding; sepals 2, shed at flower; petals 4, free, obovate to wedge-shaped, white to red or purple, persistent after pollination; stamens many, free; placentas 4–20, style 0, stigma disk-like, lobes 4–20
Fruit oblong to round, dehiscent by pores beneath stigma
Seeds many, < 0.7 mm, reniform, net-ridged, brown or black
Species in genus: ± 50 species: especially Eurasia
Etymology: (Latin: poppy)
P. apulum Ten. var. micranthum (Boreau) Fedde, P. dubium L., P. hybridum L. perhaps in CA as waifs.


P. argemone L.

Annual 20–50 cm, stiff-hairy
Leaf 3–12 cm
Flower: petals 2 cm, pale scarlet, base dark-spotted
Fruit 1.5–2 cm, narrowly obovate
Ecology: Uncommon. Disturbed areas
Elevation: < 500 m.
Bioregional distribution: California Floristic Province
Distribution outside California: native to Eurasia; cultivated
Perhaps only a waif in CA.

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bioregional map for PAPAVER%20argemone 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 Papaver argemone
Retrieve dichotomous key for Papaver
Overlay Consortium of California Herbaria specimen data by county on this map
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