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.

Petunia ×atkinsiana Loud.
Common Name: PETUNIA
Coefficient of Conservatism: *
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Ad A-Forb

Petunia ×atkinsiana R. W. Smith

Our petunias, so familiar as ornamentals, are natives of South America, rarely escaped temporarily to roadsides, fields, shores, and other such sites. First collected in 1923 in Washtenaw Co.

The common garden petunia is an annual of hybrid origin, and has been so extensively manipulated and selected that drawing lines between species and hybrids is difficult. The collective name P. ×atkinsiana is used here for the few recorded escapes from cultivation.


Berrien County
Hillsdale County
Houghton County
Kalamazoo County
Monroe County
Washtenaw County


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