1. Raceme many-flowered, slender, elongate at maturity, exceeding the subtending petiole (or even the entire leaf); pedicels much longer than the tiny bractlets (less than 1 mm) at base of calyx.
1. Raceme few-flowered, scarcely if at all exceeding the subtending petiole; pedicels shorter than the pair of large bractlets which subtend and conceal the calyx at anthesis.
All species found in Phaseolus
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. June 27, 2017. http://michiganflora.net/genus.aspx?id=Phaseolus.