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Argemone

Prickly Poppy
Papaveraceae
Annuals

Native to central and North America. Prickly-leafed and prickly-stemmed plants to 3 ft. tall, 1 1/2 ft. wide, with large, showy poppies that bloom mainly in summer. Easy to grow from seeds sown in place or in pots (transplant gently). Will reseed and colonize. Provide good drainage. Seed specialists may offer other species.

Argemone mexicana
Argemone mexicana

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Argemone mexicana

Native to West Indies and probably Central America and Florida; naturalized in the Southwest and Hawaii. Yellow to orange, 1 1/2–2 1/2-in. flowers. ‘Yellow Lustre’ grows to 1 1/2–2 ft. tall, has lemony orange blooms and blue-green leaves veined in silver.

Argemone polyanthemos (photo courtesy of Charles Mann)
Argemone polyanthemos (photo courtesy of Charles Mann)

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Argemone polyanthemos

Western native with white, 2 1/2–4-in. flowers.

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