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 tall. It is perennial and its leaves are a deep green, elliptic, and grow up to long.Missouri Botanical Garden Retrieved November 23, 2015 Its flowers have five petals and it can have thirteen or more stamens.Wildflower Center Retrieved November 23, 2015GoBotany: New England Retrieved November 23, 2015
Taxonomy Accepted infraspecifics include: 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.Illinois Flower Info Retrieved November 23, 2015 It occurs in Russia, Mongolia, Korea, Taiwan, China, Vietnam, Canada, and the United States.
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