Acorus americanus (Raf.) Raf.
Common Name: SWEET-FLAG
Synonym: Acorus calamus
Coefficient of Conservatism: 6
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt P-Forb

Acorus americanus fruit G. Vaclavek fruit

Included in A. calamus in Michigan Flora.

Marshes, wet meadows, edges of rivers and streams; often rather local.

The native, American plant is a diploid that sets fruit, but is otherwise very similar to the Eurasian plant. The venation character is subtle, but generally unambiguous with comparative material.

Locations

Alcona County
Alger County
Baraga County
Berrien County
Calhoun County
Cheboygan County
Chippewa County
Clinton County
Delta County
Gogebic County
Houghton County
Ingham County
Iosco County
Kalamazoo County
Lenawee County
Livingston County
Mackinac County
Mecosta County
Menominee County
Midland County
Monroe County
Montmorency County
Muskegon County
Oakland County
Ontonagon County
Ottawa County
Presque Isle County
Schoolcraft County
St. Clair County
Tuscola 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. December 18, 2017. http://www.michiganflora.net/species.aspx?id=4.