SUMMER KEY TO THE SPECIES OF CARYA 



a. Bark of trunk essentially smooth, not deeply furrowed nor 

 shaggy; 'husk of fruit less than y% inch thick, 

 b. Leaflets usually 5-7, glabrous beneath; buds dome-shaped, 

 greenish; kernel of nut sweet. 



c. Twigs long-hairy; fruit less than i inch long 



C. microcarpa, p. 75. 



cc. Twigs glabrous or nearly so; fruit i l / 2 -2 inches long 



C. glabra, p .77. 



bb. Leaflets usually 7-11, more or less downy beneath; buds 



elongated, bright yellow ; kernel of nut bitter 



C. cordiformis, p. 79. 



aa. Bark of trunk deeply furrowed or shaggy; husk of fruit 

 more than y% inch thick. 



b. Twigs more or less pubescent; leaflets 5-7, more or less 

 pubescent beneath, 

 c. Twigs brownish; buds densely hairy; fruit 1^-2 inches 



long C. alba, p. 73. 



cc. Twigs orange; buds merely puberulous; fruit 1^-2^2 



indies long; (leaflets usually 7) C. laciniosa, p. 71. 



bb. Twigs tending to be glabrous; leaflets usually 5, glabrous 

 beneath C. ovaia, p. 69. 



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