FABACEAE: Legume Family
KEY TO SPECIES OF LESPEDEZA
1. Leaflet apex mostly broadly obtuse to narrowly or broadly rounded, stalk of lateral leaflets (1.8)2-2.7 X 0.4-0.6 mm. Calyx lobes shorter or no longer than cup except perhaps the lowest lobe .................................... L. bicolor
1. Leaflet apex mostly acute to short acuminate, stalk of lateral leaflets to 3.5 X 1 mm. Calyx lobes longer than cup …………….. L. thunbergii