Barrenwort
Epimedium
sp.

Tough, long-lived groundcover. Prefers moist, well-drained organic soils in light to dense shade. Will tolerate dry shade and tree roots once it gets established. Grows 12–15 inches tall. Late spring to early summer bloom. Nice fall foliage color. Space 10–12 inches apart. Perennial. Hardy in Zone 5.