Fritillaria raddeana

Airy coronas of moonlight-yellow, cup-shaped, 2-inch-wide flowers repose on 2- to 3-foot stems in April. Sun, good drainage, and some summer warmth suit it best. It’s as rock-hardy and long-lived here as the run of the mill crown imperials are not. Steppe; NE Iran to Turkmenistan. Zone 4.