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FNA | Family List | FNA Vol. 21 | Asteraceae | Silphium

5b. Silphium perfoliatum Linnaeus var. perfoliatum

Stems glabrous, hispid, or scabrous. Peduncles usually scabrous to hispid. 2n = 14.

Flowering summer–early fall. Wet prairies, open forests, and river bottoms; 50–500 m; Ont.; Ala., Ark., Conn., Ill., Ind., Iowa, Kans., Ky., La., Mass., Mich., Minn., Miss., Mo., Nebr., N.J., N.Y., N.C., N.Dak., Ohio, Okla., Pa., S.Dak., Tenn., Tex., Vt., Va., W.Va., Wis.


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