Taxonomic Filter:
Taxa Count: 26
ASTERACEAE
Silphium
Silphium albiflorum
Silphium asperrimum
Silphium asteriscus
Silphium asteriscus var. asteriscus
Silphium asteriscus var. simpsonii
Silphium gatesii
Silphium gracile
Silphium integrifolium
Silphium integrifolium var. asperrimum
Silphium integrifolium var. integrifolium
Silphium integrifolium var. laeve
Silphium laciniatum
Silphium laciniatum var. laciniatum
Silphium laciniatum var. robinsonii
Silphium perfoliatum
Silphium perfoliatum var. perfoliatum
Silphium radula
Silphium radula var. gracile
Silphium radula var. radula
Silphium reverchonii
Silphium scaberrimum
Silphium simpsonii
Silphium simpsonii var. wrightii
Silphium speciosum
Silphium terebinthinaceum