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.


Included in Guttiferae in Michigan Flora. The family is easily recognized by the opposite, entire, punctate leaves (translucent dots ± visible when held to the light, resulting from oil-filled cavities); the inflorescence is cymose, with the terminal flower in each cluster developing first.

1. Petals yellow (occasionally flushed with pinkish), the flowers ordinarily opening; stamens more than 9, or not in distinct groups, without alternating glands; capsules not striate.


1. Petals pink to purple, the flowers rarely open; stamens 9, in 3 distinct groups of 3 each, the groups of basally connate stamens alternating with conspicuous glands; capsules, even when immature, prominently striate longitudinally.



MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. February 1, 2023.