Collinsonia canadensis, commonly called richweed, is a perennial herb in the mint family.
It is native to eastern North America, primarily east of the Mississippi River, where it is widespread. It is the most broadly distributed member of the genus Collinsonia, ranging north to Quebec and south to Florida. Its natural habitat is nutrient-rich mesic forests, most often in rocky, calcareous areas.It produces lemon-scented flowers in mid-summer, a time when little else is in bloom in densely shaded ...
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