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.


Both of our species have few but rather showy pink-violet to blue-violet flowers in nearly sessile or short-stalked terminal or axillary clusters.

1. Calyx lobes narrowly linear, up to 1 mm broad at base and ca. 15–30 times as long; leaves with spreading hairs (much longer than any minute strigose ones), especially on main veins and margins.

R. humilis

1. Calyx lobes lanceolate, ca. 3–6 times as long as broad; leaves with minute usually ± strigose pubescence.

R. strepens

All species found in Ruellia

Ruellia humilisHAIRY RUELLIA 
Ruellia strepensSMOOTH RUELLIA 


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