Clinopodium acinos (L.) Kuntze
Common Name: MOTHER-OF-THYME, BASIL-THYME
Synonym: Acinos arvensis
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad A-Forb

Acinos arvensis of Michigan Flora.

A native of Europe and especially well established in counties near the Straits of Mackinac, where its preferred calcareous habitat abounds. Collected by the First Survey in Kalamazoo Co. in 1839 but not again gathered in Michigan until 1909–1917, at sites in Emmet and Cheboygan Cos. By the 1950’s it was showing up more commonly, in sandy, gravelly, and rocky clearings, roadsides, fields, and shores; also along trails and railroads.

This little blue-flowered annual closely resembles Hedeoma pulegioides, but differs in stamen number (4), larger flowers, and having all 5 calyx lobes ciliate. Hedeoma hispida has all 5 calyx lobes ciliate, but has narrower, entire, sessile leaves. If included in Satureja, this species is called S. acinos (L.) Scheele; also known as Acinos arvensis (Lam.) Dandy.

Locations

Alpena County
Benzie County
Berrien County
Charlevoix County
Cheboygan County
Chippewa County
    Including Drummond Island
Crawford County
Emmet County
Grand Traverse County
Huron County
Kalamazoo County
Kalkaska County
Lake County
Leelanau County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Manistee County
Mecosta County
Menominee County
Muskegon County
Oakland County
Presque Isle County
Schoolcraft County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 11, 2017. http://www.michiganflora.net/species.aspx?id=1531.