Hypericum ascyron, the great St. Johnswort[2] or giant St. John's wort[3] is a flowering plant in the family Hypericaceae.
| Hypericum ascyron | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Malpighiales |
| Family: | Hypericaceae |
| Genus: | Hypericum |
| Section: | Hypericum sect. Roscyna |
| Species: | H. ascyron
|
| Binomial name | |
| Hypericum ascyron | |
Description
editThis large species of Hypericum grows to be 3–5 feet tall. It is perennial and its leaves are a deep green, elliptic, and grow up to five inches long.[4] Its flowers have five petals and it can have thirteen or more stamens.[5][6]
Taxonomy
editAccepted infraspecifics include:[7]
- Hypericum ascyron subsp. ascyron
- Hypericum ascyron subsp. gebleri
- Hypericum ascyron subsp. pyramidatum
Distribution
editIt is found Asia and North America, in the latter primarily in the American Midwest, as well as parts of New England and Quebec.[8] It occurs in Russia, Mongolia, Korea, Taiwan, China, Vietnam, Canada, and the United States.[9]
References
edit- ^ "Hypericum ascyron L." ipni.org. International Plant Names Index. Retrieved 2018-09-23.
- ^ USDA, NRCS (n.d.). "Hypericum ascyron". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 23 November 2015.
- ^ Robson, Norman K. B. "Hypericum ascyron". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). New York and Oxford: Oxford University Press. Retrieved 2018-09-23 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
- ^ Missouri Botanical Garden Retrieved November 23, 2015
- ^ Wildflower Center Retrieved November 23, 2015
- ^ GoBotany: New England Retrieved November 23, 2015
- ^ "Hypericum ascyron L." Plants of the World Online. Royal Botanical Gardens Kew. Retrieved 2018-09-23.
- ^ Illinois Flower Info Retrieved November 23, 2015
- ^ "Hypericum ascyron Descriptions". hypericum.myspecies.info. Retrieved 7 December 2018.