Hypericum ascyron explained

Hypericum ascyron, the great St. Johnswort or giant St. John's wort 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.^[1] Its flowers have five petals and it can have thirteen or more stamens.^{[2] [3]}

Taxonomy

Accepted infraspecifics include:^[4]

• 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.^[5] It occurs in Russia, Mongolia, Korea, Taiwan, China, Vietnam, Canada, and the United States.^[6]

Notes and References

1. http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=279210&isprofile=0& Missouri Botanical Garden
2. http://www.wildflower.org/plants/result.php?id_plant=HYAS80 Wildflower Center
3. https://gobotany.nativeplanttrust.org/species/hypericum/ascyron/ GoBotany: New England
4. Web site: Hypericum ascyron L. . Plants of the World Online . Royal Botanical Gardens Kew . 2018-09-23.
5. http://www.illinoiswildflowers.info/wetland/plants/giant_stjohn.htm Illinois Flower Info
6. Web site: Hypericum ascyron Descriptions . hypericum.myspecies.info . 7 December 2018.