| Silphium perfoliatum | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Silphium |
| Species: | S. perfoliatum
|
| Binomial name | |
| Silphium perfoliatum | |
Silphium perfoliatum, the cup plant[2] or cup-plant, is a species of flowering plant in the family Asteraceae, native to eastern and central North America. It is an erect herbaceous perennial with triangular toothed leaves, and daisy-like yellow composite flower heads in summer.[3]
The specific epithet perfoliatum means "through the leaf."[4]
There are two varieties:
- Silphium perfoliatum var. connatum
- Silphium perfoliatum var. perfoliatum.[5]
- ^ "NatureServe Explorer 2.0". explorer.natureserve.org.
- ^ USDA, NRCS (n.d.). "Silphium perfoliatum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 15 November 2015.
- ^ RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 978-1-4053-3296-5.
- ^ "Plants of the Eloise Butler Wildflower Garden". Friends of the Wild Flowers. 2008. Retrieved 15 May 2011.
- ^ "ITIS Standard Report Page: Silphium perfoliatum var. connatum". Itis.gov. 2010-05-13. Retrieved 2012-09-06.