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- Silphium asteriscus var. asteriscus (category Silphium asteriscus)asperrimum Hooker Silphium asteriscus var. scabrum (C. Mohr) H. E. Ahles Silphium dentatum var. gatesii L. M. Perry Silphium gatesii Michaux Silphium integrifolium3 KB (200 words) - 20:10, 5 November 2020