Silphium

Silphium mohrii

Mohr's rosinweed

Silphium perfoliatum

Indian-gum

Silphium brachiatum

Silphium albiflorum

Silphium asteriscus

Starry rosinweed

Silphium laciniatum

Polarplant

Silphium wasiotense

Silphium perplexum

Silphium integrifolium

Whole-leaf rosinweed

Silphium ternatum

Silphium asteriscus subsp. asteriscus

Silphium integrifolium var. integrifolium

Silphium integrifolium var. laeve

Silphium integrifolium var. gattingeri

Silphium asteriscus var. latifolium

Silphium asteriscus var. asteriscus

Silphium asteriscus var. dentatum

Silphium asteriscus var. simpsonii

Silphium asteriscus var. trifoliatum

Silphium radula var. gracile