Galium palustre L.
Common Name: MARSH BEDSTRAW
Coefficient of Conservatism: 3
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt P-Forb

An irregularly circumpolar species, ranging west in North America only to Lake Michigan and northern Ontario. Wet gravelly, rocky, or sandy shores and banks; moist ground, meadows, swampy hollows.

This is a rather showy species, thanks to the numerous white flowers. Not only does it have more flowers in each ultimate cyme (distal to a bract), but there is also usually more than one such ultimate cyme at the end of a stem or branch, so the impression is of many more flowers in a terminal inflorescence than are seen in other similar species (only G. labradoricum and G. obtusum have flowers as large as in G. palustre). The pedicels at maturity are ± strongly divergent, a pattern evident even before the fruit begins to ripen. In G. obtusum and other species, the pedicels may be divergent as the fruit nears maturity, but usually they are ± ascending. The leaves in G. palustre are generally 5–6 in well-developed whorls, with margins spreading- or antrorse-scabrous.

Locations

Allegan County
Alpena County
Benzie County
Berrien County
Charlevoix County
    Including Beaver Island
Chippewa County
    Including Drummond Island
Delta County
Emmet County
Houghton County
Isabella County
Kalamazoo County
Keweenaw County
Leelanau County
Luce County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Marquette County
Muskegon County
Newaygo County
Ontonagon County
Ottawa County
Presque Isle County
Schoolcraft County
Washtenaw County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 17, 2017. http://michiganflora.net/species.aspx?id=2592.