Silphium asteriscus var. trifoliatum (whorled rosinweed)

Whorled rosinweed, a member of the aster family, is a tall perennial that produces heads of large yellow flowers in mid-summer through fall. The leaves encircle the central stem in whorls of three or four. It prefers full sun to partial shade and medium to medium-dry well-drained soil. Can grow in semi-shade or no shade. Deer resistant.

Whorled rosinweed is native to the eastern United States, where it occurs in open, grassy areas and dry-mesic to dry open forests and woodlands. Birds value the seeds, and butterflies are attracted to the flowers. The flowers also attract large numbers of native bees.