A genus of herbaceous plants in the mint family, native to eastern North America, also called stone root or richwood.
Named in honor of Peter Collinson, an 18th-century English botanist and patron of plant research. The Latinized '-ia' ending follows botanical nomenclature for genus names.
Collinsonia canadensis (stone root) was used by Native Americans and early settlers as a traditional remedy, and modern herbalists still collect it—though the plants are becoming scarce because of overharvesting.
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