Collinsonia canadensis L.  
Family: Lamiaceae
Canada horse-balm, northern horse-balm, richweed, stoneroot
Collinsonia canadensis image
Kitty Kohout  
Etymology: Collinsonia: for Peter Collinson, early English botanist
Plants: erect, perennial, 20"-40" tall, aromatic forb; stems square, branched above; from thick, woody rhizomes
Leaves: opposite, toothed, smooth, oblong, several pairs scattered on the stem
Flowers: 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.
Fruits: 1-seeded nutlet
Habitat: woods; in rich soil
Conservation Status: Endangered
Collinsonia canadensis image
Wisconsin Dept. of Natural Resources  
Collinsonia canadensis image
Emmet J. Judziewicz  
Collinsonia canadensis image
Marion Sheehan  
Collinsonia canadensis image
Marion Sheehan  
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