Scientific name Silphium Rank Genus | Higher classification Daisy family | |
Lower classifications |
Silphium is a genus of North American plants in the sunflower tribe within the daisy family.
Members of the genus, commonly known as rosinweeds, are herbaceous perennial plants growing to 0.5–4 m tall, with yellow (rarely white) flowerheads. The name of the genus comes from the Ancient Greek word for a North African plant whose identity has been lost, though it is known its gum or juice was prized by the ancients as a medicine and a condiment.

- Silphium albiflorum A.Gray – white rosinweed – TX
- Silphium asteriscus L. – starry rosinweed – TX OK LA AR MO IL IN KY TN AL MS GA FL SC NC VA WV OH MD PA NY
- Silphium brachiatum Gatt. – Cumberland rosinweed – TN AL GA
- Silphium compositum Michx. – kidneyleaf rosinweed – TN AL GA FL SC NC VA WV
- Silphium glutinosum J.R. Allison AL
- Silphium integrifolium Michx. – wholeleaf rosinweed – NM TX LA OK AR MO KS CO WY SD NE IA IL IN KY TN MS AL WI MI MA ONT
- Silphium laciniatum L. – compassplant – NM TX LA OK AR MO KS CO SD NE MN IA IL IN KY TN MS AL WI MI VA PA NY ONT
- Silphium laeve Hook. – WA ID
- Silphium mohrii Small – Mohr's rosinweed – TN AL GA
- Silphium perfoliatum L. – cup plant – NM TX LA OK AR MO KS CO SD ND NE MN IA IL INKY TN MS AL WI MI NC VA DE PA NY NJ CT RI MA VT NH ME ONT QUE NB
- Silphium perplexum J.R.Allison – Old Cahaba rosinweed – AL
- Silphium pinnatifidum Elliott – Cutleaf prairie dock – AL GA KY TN
- Silphium radula Nutt. – roughstem rosinweed – KS MO AR OK TX LA
- Silphium terebinthinaceum Jacq. – prairie rosinweed, prairie dock – IA MO AR MS AL GA SC NC VA WV TN KY OH IN IL WI MI NY ONT
- Silphium ternatum Sessé & Moc. – Mexico
- Silphium trifoliatum L. – whorled rosinweed – AL GA IN KY MD NC SC OH PA VA WV
- Silphium wasiotense M.Medley – Appalachian rosinweed – KY TN
numerous species now regarded as members of other genera: Berlandiera Verbesina



References
Silphium (genus) Wikipedia(Text) CC BY-SA