CORNACEAE: Dogwood Family
KEY TO SPECIES OF NYSSA
1. Leaf blade 51-137 X 15-41 mm. Male flowers with peduncle 8-40(51) mm. Fruit ovoid .......................................................... N. biflora
1. Leaf blade 30-59 X 15-38 mm. Male flowers with peduncle 5-20 mm. Fruit globose ................................................................. N. ursina