Swaziland's Alien Plants Database

Argemone mexicana L. forma mexicana
(Argemone mexicana)
PAPAVERACEAE
Mexican pricklepoppy, Mexican poppy, devil's fig, golden thistle of Peru, Mexican thistle, prickly poppy, white thistle, yellow poppy, umJelemani
Invasive, Problem species
Origin: South America
Growth Form: Herb
Plant Description: Plant: Annual, very spiny herb up to 0.9 m high; stems exude a yellow sap when cut. Leaves: Bluish-green, with prominent white veins, spiny; up to 150 mm x 60 mm. Flowers: Bright yellow, September–January(–all year). Fruit: Spiny capsules, ovoid , green turning brown, up to 50 mm long, splitting into five lobes and releasing numerous small black seeds.
Key Features:
Control: shallow cultivation, post-emergence herbicides for small plants
Comments:
More information:
Weeds & Invasive Plants Home Page
NRCS Plants Database

Photo - flowers/leaves



W.L. Wagner @ USDA-NRCS PLANTS Database

Illustration



USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada.

Photo - flowers/leaves



Clarence A. Rechenthin @ USDA-NRCS PLANTS Database

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