WINTER KEY TO THE SPECIES OF CARYA 



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

 shaggy; husk of fruit less than ^ inch thick, 

 b. Terminal bud narrow, long-pointed, flattish, bright yellow ; 



kernel of nut bitter C. cordiformis, p. 79. 



bb. Terminal bud broad, dome-shaped, not bright yellow; 



kernel of nut sweet 

 c. Buds greenish; twigs glabrous; fruit i l / 2 -2 inches long 



C. glabra, p. 77. 



cc. Buds red-brown ; twigs long-hairy ; fruit less than i inch 



long C. microcarpa, p. 75. 



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

 more than J /& inch thick. 



b. Twigs more or less pubescent; buds more or less pube- 

 scent. 



c. Buds ^2-^4 inch long, densely haiiry; outer bud-scales 

 deciduous in autumn; twigs brownish; fruit 1^2-2 inches 



long C. alba, p. 73. 



cc. Buds about i inch long, merely puberulous; outer bud- 

 scales persistent until spring; twigs orange colored; 



fruit 1^-2^2 inches long C. laciniosa, p. 71. 



bb. Twigs tending to be glabrous ; buds glabrous or nearly so 

 C. ovata, p. 69. 



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