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Round-fruited St. John’s-wort (Hypericum sphaerocarpum, Hypericaceae) in Canada

Michael J. Oldham, William D. Van Hemessen, Sean Blaney


Round-fruited St. John’s-wort (Hypericum sphaerocarpum), a native North American herbaceous, perennial vascular plant, is reported from four sites in southern Ontario, Canada. All four sites are along abandoned railway lines. Although the rich association of native flora suggests native status at one site, H. sphaerocarpum is believed to be introduced elsewhere in its Canadian range in Ontario.


Round-fruited St. John’s-wort; Hypericum sphaerocarpum; Hypericaceae; Ontario; Canada; range extension; railway

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