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Collinsonia canadensis L.
Common Name: STONEROOT, HORSE-BALM, RICHWEED
Coefficient of Conservatism: 8
Coefficient of Wetness: 0
Wetness Index: FAC
Physiognomy: Nt P-Forb

Oak-hickory and sassafras or, more often, rich beech-maple or even deciduous swamps.

A stout plant (to 1.5 m tall), large-leaved, from a large hard rhizome. The flowers and crushed foliage have a strong lemon-like fragrance. Perilla frutescens is sometimes mistaken as this species, but is annual and has white to pink corollas (not yellow), with 4 stamens (not exserted), large bracts, and generally shorter pedicels.

Locations

Branch County
Calhoun County
Cass County
Eaton County
Genesee County
Hillsdale County
Ingham County
Jackson County
Kalamazoo County
Kent County
Lapeer County
Leelanau County
Lenawee County
Livingston County
Macomb County
Monroe County
Muskegon County
Oakland County
Ottawa County
Saginaw County
St. Clair County
St. Joseph County
Van Buren County
Washtenaw County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. January 28, 2023. https://michiganflora.net/species.aspx?id=1542.