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Silphium trifoliatum
Also called Rosin Weed
Whorled rosinweed is a tall perennial prairie wildflower native to the eastern United States, with yellow daisy-like flower heads in mid-summer through fall. It needs full sun and well-drained soil, and is best grown in open, grassy settings.
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.
It can be distinguished by its smooth stems and leaves that are often in whorls of three. In contrast, S. asteriscus has scabrous to hispid stems and leaves, which are opposite or alternate. In addition, S. astericus has eglandular pales (the bracts in the flower heads), while the pales of S. asteriscus are often glandular. There remains much disagreement about the best taxonomic treatment of the S. asteriscus complex.
White rosinweed · Starry rosinweed · Cumberland rosinweed · Kidneyleaf rosinweed · Wholeleaf rosinweed · Compassplant · Mohr's rosinweed · Cup plant · Old Cahaba rosinweed · Tansy rosinweed · Roughstem rosinweed · Prairie rosinweed
Text excerpted from the Wikipedia article Silphium trifoliatum by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
