Senna marilandica, the Maryland senna,wild senna or Maryland wild senna, is a perennial flowering plant in the United States that blooms in the summer and can grow up to six feet tall. It prefers average to wet soil, and is native in the southeast, all the way to the southern Great Lakes.
Senna marilandica, commonly called wild senna, is an erect, shrubby, Missouri native herbaceous perennial which typically occurs in open woods and wet meadows and grows 4-6' tall. Features axillary racemes of brownish-yellow, pea-like flowers clustered atop unbranched stems in summer. Flowers give way to pendant, pea-like seed pods (to 4" long) which turn black in fall and persist on the plants well after the plant has in the normal course died back to the ground. Feathery, compound, locust-like, dull green leaves (4-8 pairs of oval leaflets). Formerly known as and often still sold as Cassia marilandica.
Specific epithet means of Maryland.