|Scientific Name||Argemone polyanthemos||USDA PLANTS Symbol||ARPO2|
|Common Name||Crested Prickly-poppy, Thistle Poppy||ITIS Taxonomic Serial No.||18926|
Life zones and habitat: Plains to Montane (3700 to 8000 ft.); dry, sandy soils in grasslands and along roadsides.
Plant: Erect annual or biennial; stout, somewhat prickly stems, 16 to 32 inches tall.
Leaves: Basal leaves in a rosette; stem leaves alternate, deeply pinnately-lobed, 2-3/4 to 8 inches long, upper surface unarmed, lower with prickles on main veins; prickles on margins and lobe tips.
Inflorescence: Showy, large white blossoms, 2-3/4 to 4 inches across; 6 white papery-thin petals, 150 or more bright yellow stamens; flower buds ellipsoid-oblong, body 5/8 to 7/8 inches long, somewhat prickly.
Bloom Period: June to August.
Fruit: Very prickly ellipsoid-shaped capsule is less than 1/4 inch long (including stigma and excluding prickles).
References: "Flora of Colorado" by Jennifer Ackerfield, American Southwest and SEINet.
|BONAP Distribution Map
Map Color Key
© Tom Lebsack 2022
Banner photo: Ten Mile Range and Rhodiola integrifolia (King’s Crown) in Summit County