Calylophus serrulatus (Plains Evening Primrose) is a low, shrubby, woody-based perennial boasting small, yellow, four-petaled, stalkless flowers borne from the upper leaf axils. Blooming from mid-spring to mid-summer, the blossoms are more profuse at the beginning of the flowering period, becoming sporadic throughout the rest of the summer. Unlike many other evening primrose species, the flowers open in the evening and remain open for the entire day. They are followed by 1 in. long seed capsules (2.5 cm). The 2 in. leaves (5 cm) are narrow, lance-shaped, and sharply toothed. Native to western North America, Calylophus serrulatus can be found growing in dry prairies and mesas. A valuable plant for dry border fronts, rock gardens, and prairies.

• Grows up to 6-18 in. tall and wide (15-45 cm).
• Best in full sun in gravelly or sandy, dry, well-drained soils. Excellent drought tolerance.
• A great choice for prairies and meadows, wildflower gardens, rock gardens, and border fronts.
• No serious pest or disease issues.
• Propagate by seed or cuttings taken in early summer. This is a taprooted plant that can be difficult to transplant once established.
• Native to western North America.