| Contains | Silphium albiflorum A. Gray Silphium angustum (A.Gray) Small Silphium arborescens Mill. Silphium asperrimum Hook. Silphium astericus Linnaeus Silphium asteriscus Linnaeus Silphium atropurpureum Retzius Silphium betonicifolia Hooker Silphium betonicifolium Hook. Silphium brachiatum Gattinger Silphium chichamangense Canby Silphium chickamaugense Canby Silphium compositum Michx. Silphium compressum Hort. Silphium confertifolium Small Silphium conjunctum Willd. Silphium connatum L. Silphium dentatum Elliott Silphium edule Baill. Silphium elatum Banks ex Pursh Silphium elliottii Small Silphium equatoriale Spruce Silphium erythrocaulon Bernh. ex Spreng. Silphium gatesii D. Mohr Silphium glabrum Eggert ex Small Silphium glutinosum J. R. Allison Silphium gracile A. Gray Silphium gummiferum Elliott Silphium helianthoides Greene Silphium hornemannii Schrad. ex DC. Silphium incisum Greene Silphium integrifolium Michaux Silphium laciniatum Linnaeus Silphium laeve Hook. Silphium laevigatum Elliott Silphium lanceolatum Canby Silphium lapsuum Small Silphium mohrii Small Silphium nodum Small Silphium nudicaule M.A.Curtis Silphium nuttallianum Torr. Silphium orae Small Silphium ovatifolium (Torr. & A.Gray) Small Silphium patulum Banks ex Pursh Silphium perfoliatum Linnaeus Silphium peristenium Raf. Silphium perplexum J. R. Allison Silphium petiolatum Poir. Silphium pinnatifidum T.Nees Silphium platypterum Spruce ex Benth. & Hook.fil. Silphium pseudolaciniatum Fraser ex DC. Silphium pumilum Pursh Silphium quadrangulum Hedw. Silphium radula Nuttall Silphium reniforme Raf. ex Nutt. Silphium reticulatum Raf. Silphium reverchonii Bush Silphium rumicifolium Small Silphium scaberrimum Elliot Silphium simpsonii Greene Silphium sinuatum Banks ex Pursh Silphium solidaginoides L. Silphium sp. Silphium speciosum Nuttall Silphium spicatum Poir. Silphium subacaule Nutt. Silphium terebinthinaceum Jacquin Silphium ternatum Sessé & Moc. Silphium ternifolium Michx. Silphium tetragonotheca (L.) Gaertn. Silphium tetragonum Moench Silphium tomentosum Banks ex Pursh Silphium trifoliatum Linnaeus Silphium trilobatum L. Silphium venosum Small Silphium wasiotense Medley Silphium wasiotensis Medley |
