Hypericum ascyron
Scientific classification Edit this 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

Hypericum ascyron, the great St. Johnswort[2] or giant St. John's wort[3] is a flowering plant in the family Hypericaceae.

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]

References

  1. ↑ "Hypericum ascyron L." ipni.org. International Plant Names Index. Retrieved 2018-09-23.
  2. ↑ USDA, NRCS (n.d.). "Hypericum ascyron". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 23 November 2015.
  3. ↑ 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.
  4. ↑ Missouri Botanical Garden Retrieved November 23, 2015
  5. ↑ Wildflower Center Retrieved November 23, 2015
  6. ↑ GoBotany: New England Retrieved November 23, 2015
  7. ↑ "Hypericum ascyron L." Plants of the World Online. Royal Botanical Gardens Kew. Retrieved 2018-09-23.
  8. ↑ Illinois Flower Info Retrieved November 23, 2015
  9. ↑ "Hypericum ascyron Descriptions". hypericum.myspecies.info. Retrieved 7 December 2018.
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