Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

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  Collinsonia canadensis L. image
Photographer: Kitty Kohout           

Botanical Illustration

Wisconsin Department of Natural Resources

Emmet J. Judziewicz

Marion Sheehan

Marion Sheehan
Family Lamiaceae
Collinsonia canadensis L.
Canada horse-balm, northern horse-balm, richweed, stoneroot
Collinsonia: for Peter Collinson, early English botanist
canadensis: of or referring to Canada
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Endangered
Plant: erect, perennial, 20"-40" tall, aromatic forb; stems square, branched above; from thick, woody rhizomes
Flower: yellow to white, 5-parted, 1/2" long, irregularly tube-shaped, lower lip fringed, 2 stamens; flower drawing; inflorescence branched spikes of paired flowers; blooms July-Sept.
Fruit:1-seeded nutlet
Leaf:opposite, toothed, smooth, oblong, several pairs scattered on the stem
Habitat: woods; in rich soil

More Information Natural Communities Herbarium Specimens
All Collinsonia list Ethnobotany Information Google- Images or Text
There are no synonyms for this taxon.

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