Wild Senna (Senna marilandica)
This erect, shrubby herbaceous perennial is the larval food source for two sulphur butterflies. Clusters of brownish yellow, pea-like flowers top unbranched stems in summer. Flowers give way to arching, pea-like seed pods (to 4 in. long) which turn black in fall and ornamental through winter. Feathery, compound, locustlike, green leaves.
Grow in full sun to part shade in average to moist soil. Can self sow abundantly.
Use as a focal point or at the back of perennial borders and native plant gardens. Can also be planted in flood plains, open woods and wet meadows.
Height: 36 to 60 inches
Spread: 24 to 36 inches
Sun Exposure: Full Sun