Hypericum ascyron
Hypericum ascyron, the great St. Johnswort[2] or giant St. John's wort[3] is a wildflower in the genus Hypericum.
Hypericum ascyron | |
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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
This 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
Accepted infraspecifics include:[7]
- Hypericum ascyron subsp. ascyron
- Hypericum ascyron subsp. gebleri
- Hypericum ascyron subsp. pyramidatum
Distribution
It 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]
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References
- "Hypericum ascyron L." ipni.org. International Plant Names Index. Retrieved 2018-09-23.
- "Hypericum ascyron". Natural Resources Conservation Service PLANTS Database. USDA. 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. 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.
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