Silphium

Silphium perfoliatum

Indian-gum

Silphium laciniatum

Polarplant

Silphium integrifolium

Whole-leaf rosinweed

Silphium terebinthinaceum

Basal-leaf rosinweed

Silphium asteriscus

Starry rosinweed

Silphium compositum

Silphium radula

Roughleaf rosinweed

Silphium albiflorum

Silphium brachiatum

Silphium compositum var. compositum

Silphium mohrii

Mohr's rosinweed

Silphium wasiotense

Silphium glutinosum

Silphium radula var. radula

Reverchon's rosinweed

Silphium perplexum

Silphium simpsonii

Silphium dentatum

Silphium compositum var. venosum

Silphium speciosum

Silphium reniforme