BONAP's North American Plant Atlas
Citation Information
Map Color Key
Silphium albiflorum
Silphium asteriscus
Silphium brachiatum
Silphium compositum
Silphium glutinosum
Silphium integrifolium
Silphium laciniatum
Silphium mohrii
Silphium perfoliatum
Silphium perplexum
Silphium radula
Silphium terebinthinaceum
Silphium wasiotense
Last updated 12/15/2014.