Please try our next iteration of the Michigan Flora Online here. Beginning on February 1, 2023, will point to this new site.

The new site offers several benefits over the existing website, including real coordinate mapping, giving a clearer view of the density of documentation as well as more precision about plant distributions and their link to landforms. We will also have the ability to update species pages more regularly, both in terms of new collections and as more existing Michigan specimens are georeferenced. In addition, we have a better photo display, and offer indented keys.

Triadenum virginicum (L.) Raf.
Coefficient of Conservatism: 10
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt P-Forb

Sphagnum bogs, lake shores, old interdunal swales, wet meadows. A species of Coastal Plain affinity, disjunct to southern Michigan, northwestern Indiana, central Wisconsin, and other areas known for such plants.

The sepals are narrowly oblong to lanceolate, tapering to a more acute apex compared to the more elliptic, rounded sepals typical of T. fraseri. Plants intermediate between the two species are occasionally found.


Allegan County
Barry County
Berrien County
Calhoun County
Cass County
Ingham County
Kalamazoo County
Kent County
Lenawee County
Livingston County
Montcalm County
Muskegon County
Van Buren County
Washtenaw County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. January 30, 2023.