Amorpha

1. Leaflets with glands very inconspicuous if present beneath, but usually densely pubescent; calyx ± densely pubescent; fruit densely pubescent, the large glands thus concealed; plant unbranched or branched from the base.

A. canescens

1. Leaflets strongly gland-dotted beneath but nearly or quite glabrous; calyx glabrous except on the lobes; fruit glabrous, conspicuously glandular; plant a much-branched shrub.

A. fruticosa

All species found in Amorpha

Amorpha canescensLEAD-PLANT 
Amorpha fruticosaFALSE INDIGO 

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 13, 2017. http://michiganflora.net/genus.aspx?id=Amorpha.