A perennial deciduous herb, rapidly growing 12-18" high and 24" wide. It produces flowers with four, bright yellow, wrinkled petals that bloom spring, summer, and possibly into fall. Each flower opens in the evening, then closes the next afternoon just before the next set of flowers open, and dries to a pinkish, crumpled wad. The fruit is a long cylindrical seed capsule with four chambers splitting longitudinally along four sutures. The stems are drooping to erect, become woody with age, and have no thorns. The leaves are green, long and thin, sometimes thinly lance-shaped. (1) This plant forms a taproot.
