Silphium pinnatifidum, the tansy rosinweed[2] or cutleaf prairie dock, is a species of flowering plant in the family Asteraceae. It is native to the Southeastern United States where it is found in Alabama, Georgia, Kentucky, and Tennessee.[3] Its habitat is prairies, barrens, and cedar glades.[4]
| Silphium pinnatifidum | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Silphium |
| Species: | S. pinnatifidum
|
| Binomial name | |
| Silphium pinnatifidum Elliott
| |
Because of loss of its fire-dependent habitat, this species is uncommon and is considered vulnerable.[1][5]
Although most populations are distinct, intermediate populations have been reported between Silphium pinnatifidum and Silphium terebinthinaceum, and some botanists consider S. pinnatifidum only a variety of S. terebinthinaceum. S. pinnatifidum was once thought to be a result of hybridization between Silphium terebinthinaceum and Silphium laciniatum, although molecular studies have indicated that S. pinnatifidum is too closely allied to S. terebinthinaceum for this to be the case.[6]
References
edit- ^ a b "Silphium pinnatifidum". NatureServe. Retrieved 2014-05-04.
- ^ USDA, NRCS (n.d.). "Silphium pinnatifidum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 15 November 2015.
- ^ Flora of the Southern and Mid-Atlantic States
- ^ Chester, Edward (2015). Guide to the Vascular Plants of Tennessee.
- ^ U.S. Forest Service
- ^ [1] Jessee, L.H. and G. Yatskievych. 2011. A new putative hybrid in Silphium (Asteraceae: Heliantheae). Phytoneuron 2011–62: 1–7.