Round-fruited St. John’s-wort (Hypericum sphaerocarpum, Hypericaceae) in Canada
Keywords:Round-fruited St. John’s-wort, Hypericum sphaerocarpum, Hypericaceae, Ontario, Canada, range extension, railway
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.
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