Argemone ochroleuca

Sweet

Brit. Fl. Gard. 3: plate 242. 1828

IllustratedIntroduced
Synonyms: Argemone mexicana var. ochroleuca (Sweet) Lindley
Treatment appears in FNA Volume 3.

Plants annual or short-lived perennial. Stems branching distally, 3-10 dm, sparingly prickly. Leaf blades: abaxial surface sparingly prickly on veins, adaxial surface usually unarmed; proximal deeply lobed nearly to midrib; distal more shallowly lobed, usually clasping. Inflorescences: buds oblong, body 8-18 × 4-11 mm, with 4-10 prickles per sepal; sepal horns terete, 5-12 mm, unarmed. Flowers 3-7 cm broad, closely subtended by 1-2 foliaceous bracts; petals lemon yellow or rarely darker yellow; stamens 20-75; filaments yellow; pistil 3-6-carpellate. Capsules ovoid-ellipsoid to oblong, 20-50 × 10-18 mm (including stigma and excluding prickles), longest prickles 8-12 mm. Seeds 1.5-2 mm. 2n = 56.


Phenology: Flowering and fruiting spring–fall.
Habitat: Disturbed soil, often a weed of fields, roadways, embankments, intermountain plains
Elevation: 0-2250 m

Distribution

V3 206-distribution-map.gif

Introduced; Ariz., Mexico.

Discussion

Argemone ochroleuca is widespread in temperate and tropical regions of the world as an introduced weed.

Selected References

None.

Lower Taxa

None.

... more about "Argemone ochroleuca"
Gerald B. Ownbey +
Ariz. +  and Mexico. +
0-2250 m +
Disturbed soil, often a weed of fields, roadways, embankments, intermountain plains +
Flowering and fruiting spring–fall. +
Brit. Fl. Gard. +
Illustrated +  and Introduced +
Argemone mexicana var. ochroleuca +
Argemone ochroleuca +
Argemone +
species +