Silphium trifoliatum
L.NOT EVALUATEDPublished in L. (1753). In: Sp. Pl. 920.
Silphium asteriscus var. trifoliatum (L.) Clevinger , commonly known as whorled rosinweed, is a species of flowering plant in the family Asteraceae. It is native to the eastern United States, where it is found east of the Mississippi River. Its natural habitat is open, grassy areas such as prairies, river cobble bars, and roadsides. It is a tall perennial that produces heads of yellow flowers in mid-summer through fall.
