Hypericum ascyron
Great St. Johnswort
Family HypericaceaeAlso called Giant St. John's wort
About
Great St. Johnswort is a tall perennial of Asia and North America with large deep-green leaves and yellow flowers.
Field notes
Morphology
Grows 0.9–1.5 m tall. Leaves are deep green and elliptic, up to 13 cm long. Flowers have five petals and thirteen or more stamens.
Distribution & habitat
Asia (Russia, Mongolia, Korea, Taiwan, China, Vietnam) and North America, mainly the American Midwest, parts of New England and Quebec.
History & etymology
Three subspecies are accepted: ascyron, gebleri and pyramidatum.
Habitat
- Altitude
- Not recorded
- Altitude class
- —
- Native to
- Russia, Mongolia, South Korea, Taiwan, China, Vietnam, Canada, United States
Cultivation
- Difficulty
- Not recorded
Text adapted from Wikipedia, CC BY-SA 4.0.
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