1. Stem with only curved or curled hairs (and tiny glandular ones).
1. Stem with stiff, straight, ± reflexed hairs.
Citation:
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March 16, 2025
https://mifloradev.lsa.umich.edu/flora-demo/#/genus/Galeopsis