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Jennifer A. Clevinger +
unknown +
Ala. +, Ark. +, Fla. +, Ga. +, Ky. +, La. +, Miss. +, Mo. +, N.C. +, Okla. +, S.C. Tenn. +, Tex. +  and Va. +
50–1000 m +
Prairies, meadows, open forests, roadsides +
Flowering summer–early fall. +
Illustrated +  and Endemic +
Silphium asperrimum +, Silphium asteriscus var. scabrum +, Silphium dentatum var. gatesii +, Silphium gatesii +, Silphium integrifolium var. gattingeri +, Silphium laevigatum +  and Silphium scaberrimum +
Silphium asteriscus var. asteriscus +
Silphium asteriscus +
variety +