Allium cristophii, the Persian onion or star of Persia, is a species of flowering plant in the family Amaryllidaceae, native to Iran, Turkey, and Turkmenistan, though grown as an ornamental bulbous plant in many parts of the world. It may be sold under the synonym of Allium albopilosum. A. cristophii performs best in sun to part shade. It is toxic to cats, dogs, and horses. It prefers sandy, gritty soil with good drainage, and is best suited to USDA hardiness zones 5-8.