Galium aparine L.
Coefficient of Conservatism: 0
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Nt A-Forb

Galium aparine B. S. Walters

This is a circumpolar species of deciduous forests and thickets, especially in disturbed areas, presumably native, but apparently spreading northward in Michigan in recent years. There are few pre-1900 collections, all from the southern Lower Peninsula and none before 1860 (Washtenaw Co.) (an 1890 O. A. Farwell collection with minimal data purported to be from Keweenaw Co. is suspect and not mapped). There seems to have been rapid spread in the 1940’s and subsequently.

The bristles on the fruit are hooked at the tips and thus it is easily dispersed on fur, feathers, and human clothing. The stems are sometimes rather smooth, with a good lens (or sensitive fingers) needed to be sure of the retrorse barbs on some internodes. The greater roughness of the upper surface of the leaves, as well as the retrorse (or at least spreading) barbs on the margins, are generally good distinctions from G. triflorum, also common in deciduous forests.


Allegan County
Alpena County
Antrim County
Arenac County
Barry County
Bay County
Benzie County
Berrien County
Branch County
Calhoun County
Cass County
Charlevoix County
    Only on Beaver Island
Chippewa County
Clinton County
Delta County
Eaton County
Emmet County
Genesee County
Gogebic County
Gratiot County
Hillsdale County
Huron County
Ingham County
Ionia County
Iosco County
Isabella County
Jackson County
Kalamazoo County
Kent County
Lake County
Lapeer County
Leelanau County
    Including Fox Islands
    Including Manitou Islands
Lenawee County
Livingston County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Macomb County
Manistee County
Marquette County
Mason County
Mecosta County
Menominee County
Midland County
Missaukee County
Monroe County
Montcalm County
Muskegon County
Newaygo County
Oakland County
Oceana County
Osceola County
Ottawa County
Presque Isle County
Saginaw County
Schoolcraft County
Shiawassee County
St. Clair County
St. Joseph County
Tuscola County
Van Buren County
Washtenaw County
Wayne County
Wexford County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. October 3, 2022.