Silphium integrifolium var. deamii L. M. Perry; S. integrifolium var. neglectum Settle & Fisher

Plants 40–200 cm. Leaves: blades scabrous, pilose, hispid, or glabrous. Phyllaries: abaxial faces usually hispid, pilose, or scabrous, rarely glabrous. Ray florets 12–22. Disc florets 70–140. 2n = 14.

Flowering mid summer–early fall. Prairies, along roads and railroads; 50–600 m; Ala., Ark., Ill., Ind., Iowa, Kans., Ky., La., Mich., Miss., Mo., Nebr., Okla., S.Dak., Tenn., Wis.