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Prickly Poppy

Argemone polyanthemos (Fedde) Ownbey

Brief Summary

    Argemone polyanthemos: Brief Summary
    provided by wikipedia

    Argemone polyanthemos, the crested pricklypoppy, is an annual plant with yellow sap and showy white flowers in the poppy family (Papaveraceae).:63 It can be found in areas with dry soil in most of the North American southwest.:63 Because of its prickly defenses, and acrid taste from its poisons, grazing animals tend to avoid it, so it increases in numbers compared to other plants in grazed areas.:63

Comprehensive Description

Distribution

    Distribution
    provided by eFloras
    Colo., Kans., Mont., Nebr., N.Mex., N.Dak., Okla., S.Dak., Tex., Utah, Wyo.

Morphology

    Comments
    provided by eFloras
    Argemone polyanthemos is introduced in Utah.
    Description
    provided by eFloras
    Plants annual or biennial. Stems 4-8(-12) dm, sparingly prickly. Leaf blades: abaxial surface scattered-prickly on main veins, adaxial surface unarmed; proximal lobed 2/3 distance to midrib; distal clasping. Inflorescences: buds ellipsoid-oblong, body 15-22 × 10-15 mm, sparingly prickly; sepal horns terete, 6-10(-15) mm, usually unarmed. Flowers 7-10 cm broad, usually closely subtended by 1-2 foliaceous bracts; petals white, very rarely lavender; stamens 150 or more; filaments lemon yellow; pistil 3-4-carpellate. Capsules narrowly to broadly ellipsoid, 35-50 × 10-17 mm (including stigma and excluding prickles), prickly, surface clearly visible, prickles widely spaced, longest 4-10(-12) mm, interspersed with a few shorter ones. Seeds ca. 2 mm. 2 n = 28.

Diagnostic Description

    Synonym
    provided by eFloras
    Argemone intermedia Sweet var. polyanthemos Fedde in H. G. A. Engler, Pflanzenr. 40[IV,104]: 283. 1909

Habitat

    Habitat
    provided by eFloras
    Prairies, foothills and mesas; 300-2300m.

Cyclicity

    Flowering/Fruiting
    provided by eFloras
    Flowering spring-summer; fruiting late spring-summer.