Argemone polyanthemos, commonly known as crested pricklypoppy, is an annual herb native to the Great Plains and the Intermountain West of the United States, including dry soils from Texas to North Dakota and west to Washington State. It has also naturalized in adjacent areas, primarily east of the Rocky Mountains. Crested pricklypoppy typically grows up to 4 feet tall with pale blue-green, deeply lobed leaves that are spiny and have a waxy coating, giving the plant a distinctive silver-blue appearance. The showy white flowers, blooming from late spring to summer, have 4-6 thin, white petals surrounding prominent yellow stamens, creating a stark contrast against the foliage. The plant produces a thick orange-yellow sap when cut, which, along with its prickly defenses, deters grazing animals.

Crested pricklypoppy is valued for its drought tolerance and long-lasting, showy blooms, making it suitable for xeriscaping and naturalistic plantings in arid regions. It thrives in full sun and is adaptable to a range of soil types, including sandy or gravelly soils with good drainage. While it is not commonly used in formal garden settings, its striking appearance can add interest to wildflower meadows and restoration projects. Gardeners should note that the sap contains alkaloids and can be toxic if ingested. Additionally, the plant’s self-seeding capability may lead to it spreading beyond its intended area, so care should be taken to manage its growth in cultivated landscapes.CC BY-SA 4.0