Photo: Collinsonia canadensis.

Flowering plants. Marburg bot.g., Germany. Planted. 2006-10-02.
Collinsonia canadensis L. Engl.: stone root, collinsonia, hardhack, heal-all, horse-weed, horsebalm, knob-root, knob-weed, knot-root, knot-weed, northern horse-balm, ox-balm, rich-leaf, richweed. Sven.: hästmynta. Fran.: baume de cheval, guérit-tout
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Photo: Collinsonia canadensis.