Wild Senna (Senna marilandica)
Other common names: Maryland senna, Maryland wild senna, Southern wild senna.
Formerly known as: Cassia marilandica
Plant type: A native herbaceous perennial subshrub.
Plant family: Fabaceae (Pea/Legume family)
Native Range: Midwest and southeastern United States
Size: 3 to 6 feet high with a spread of 2 to 3 feet
Habitat - Open rocky woods, thickets, wet meadows, bases of bluffs, slopes.
Light requirements: Sun (Note: All sources seem to agree that this plant prefers full sun, but ours is growing in thicket at the edge of the yard and receives only a couple of hours of morning sunny. It's in total shade for the remainder of the day.)
Sources and links:
Missouri Flora
USDA Plant Profile and Distribution Map
Kemper Center for Home Gardening
Lady Bird Johnson Wildflower Center
Missouri Flora
USDA Plant Profile and Distribution Map
Kemper Center for Home Gardening
Lady Bird Johnson Wildflower Center