cc. Buds brownish; twigs brownish or grayish. 
d. Buds glabrous, or somewhat pubescent at the apex 
only; bark dark gray on the trunk.................- 
seat ds taghnumeshinen is eseas latins A. saccharum, p. 181. 
dd. Buds hoary-pubescent; bark sometimes almost black 
on the trunk........... A, saccharum nigrum, p. 183. 
aa. Terminal buds usually 14-% inch in length. 
b. Buds reddish; opposite leaf-scars meeting. 
c. Buds conspicuously stalked; bud-scales visible, 1 pair; 
bark longitudinally white-striped; small tree or large 
SHU si aivsachline caw etone-eaveelshs A. pennsylvanicum, p. 177. 
cc. Buds not conspicuously stalked; bud-scales visible, 2-3 
pairs; bark not white-striped; large tree............... 
ny ME SAGAS EE aGNG BRSasaRA EL Maley A. platanoides, p. 189. 
bb. Buds bright green; opposite leaf-scars not meeting...... 
A, pseudo-platanus, p. 191. 
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