WINTER KEY TO THE SPECIES OF CARYA 



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

 shaggy; husk of fruit less than J/g 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. 7~. 



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 % inch thick. 



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

 scent. 



c. Buds V^A .inch long, densely hairy; outer bud-scales 

 deciduous in autumn; twigs brownish; fruit 1^-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 i^/4-2 l /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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