Galeopsis

1. Stem with only curved or curled hairs (and tiny glandular ones).

G. ladanum

1. Stem with stiff, straight, ± reflexed hairs.

G. tetrahit

All species found in Galeopsis

Galeopsis ladanumRED HEMP NETTLE 
Galeopsis tetrahitHEMP-NETTLE 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. November 22, 2017. http://michiganflora.net/genus.aspx?id=Galeopsis.