1. Stem with only curved or curled hairs (and tiny glandular ones).
1. Stem with stiff, straight, ± reflexed hairs.
All species found in Galeopsis
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. September 19, 2017. http://michiganflora.net/genus.aspx?id=Galeopsis.