120 KEY TO GENERA AND SPECIES 



180. Flower-producing buds developing both flow- 

 ers and leaves. Inner scales at the base of 

 the flower-stalks longer than the outer, 

 spreading. Fruit sweet. Cult. 

 and escaped. (Figs. 225, 226.) 

 Sweet Cherry, Prunus Avium L. 



180. Flower-producing buds develop- 

 ing only flowers. Inner scales 

 at the base of the flower-stalks 

 about like the outer, not 

 spreading. Fruit acid, red. 

 Cult, and escaped. (Fig. 227.) 

 Sour Cherry, Prunus Cera- Fi 



SUS L. Sour Cherry. 



LOCUST. Leaves pinnately compound. Fruit flat, 

 similar to a bean or pea pod, with 2 or more 

 seeds. 



181. Young twigs sticky. Va. southward, also 

 cult, and escaped. (Fig. 228.) Clammy 

 Locust, Rose Acacia, Robinia viscosa 

 Vent. 



181. Young twigs not sticky. Penn. and along the 

 mountains to Ga., also cult, and escaped. 

 (Figs. 229, 230.) Common Locust, Black 

 Locust, Yellow Locust, White Locust, 

 Robinia Pseudo-Acacia L. 



