Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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PAPAVERACEAE

POPPY FAMILY

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.

PAPAVER

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.

Introduced

P. somniferum L.

OPIUM POPPY

Annual 60–120 cm, glaucous, glabrous or sparsely hairy
Leaf 10–20 cm; bases of cauline leaves wide, clasping stem
Flower: petals 4–6 cm, white to red or purple
Fruit 3–5 cm, round
Ecology: Disturbed areas, fallow fields
Elevation: < 500 m.
Bioregional distribution: California Floristic Province
Distribution outside California: native to Eurasia; cultivated
Perhaps only a waif in CA. TOXIC, source of morphine and other alkaloids.

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