Author:Jennifer A. Clevinger Contents 1 Affiliation 1.1 Institution 1.2 Location 2 Treatments Affiliation Affiliation information has been provided by Volume 19-20-21. Institution Walsh University Location North Canton, OhioTreatments SSilphium Silphium albiflorum Silphium asteriscus Silphium asteriscus var. asteriscus Silphium asteriscus var. dentatum Silphium asteriscus var. latifolium Silphium asteriscus var. simpsonii Silphium asteriscus var. trifoliatum Silphium brachiatum S cont.Silphium compositum Silphium glutinosum Silphium integrifolium Silphium integrifolium var. integrifolium Silphium integrifolium var. laeve Silphium laciniatum Silphium mohrii Silphium perfoliatum Silphium perfoliatum var. connatum S cont.Silphium perfoliatum var. perfoliatum Silphium radula Silphium radula var. gracile Silphium radula var. radula Silphium terebinthinaceum Silphium terebinthinaceum var. pinnatifidum Silphium terebinthinaceum var. terebinthinaceum Silphium wasiotense