Hairy St. John’s-wort (Hypericum hirsutum L.) in the Toronto Area, New to North America

Paul A. Heydon, Gavin C. Miller, Michael J. Oldham


Hairy St. John’s-wort (Hypericum hirsutum L.) is newly reported for Canada and North America based on two collections from the Toronto, Ontario, area. This perennial Eurasian herb has a large natural range from western Europe to western China. It grows in moist successional, edge, and meadow habitats. It should be looked for in such habitats elsewhere in eastern North America.


Hairy St. John’s-wort; Hypericum hirsutum; Hypericaceae; herbs; first records; range expansion; Ontario; eastern Canada; North America

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