Silphium integrifolium Michx. | | a | | Silphium integrifoliumMichx. | |
Silphium laciniatum L. | | a | | Silphium laciniatumL. | |
Silphium perfoliatum L. | | a | | Silphium perfoliatumL. | |
Silphium trifoliatum L. | | a | | Silphium trifoliatumL. | |
Silphium trilobatum L. | Sphagneticola trilobata (L.) Pruski | | | Silphium trilobatumL. | Sphagneticola trilobata(L.) Pruski |
Silphium spp. | | a | | Silphium spp. | |
Silphium peristenium Raf. | Engelmannia peristenia (Raf.) Goodman & C. A. Lawson | | | Silphium peristeniumRaf. | Engelmannia peristenia(Raf.) Goodman & C. A. Lawson |
Silphium terebinthinaceum Jacq. | | a | | Silphium terebinthinaceumJacq. | |
Silphium compositum Michx. | | a | | Silphium compositumMichx. | |
Silphium pumilum Michx. | Berlandiera pumila (Michx.) Nutt. | | | Silphium pumilumMichx. | Berlandiera pumila(Michx.) Nutt. |
Silphium betonicifolia Hook. | Berlandiera ×betonicifolia (Hook.) Small | | | Silphium betonicifoliaHook. | Berlandiera betonicifolia(Hook.) Small |
Silphium albiflorum A. Gray | | a | | Silphium albiflorumA. Gray | |
Silphium radula Nutt. | | a | | Silphium radulaNutt. | |
Silphium radula Nutt. var. radula | | a | i | Silphium radulaNutt. var.radula | |
Silphium radula Nutt. var. gracile (A. Gray) Clevinger | | a | i | Silphium radulaNutt. var.gracile (A. Gray) Clevinger | |
Silphium wasiotense Medley | | a | | Silphium wasiotenseMedley | |