14 A Bud and Twig Key 



ii. Branchlets two years old covered with 

 soft pale pubescence, twigs stout light 

 'brown becoming darker the second year, 

 buds brown broadly ovate obtuse about 

 one-eighth inch long. 



Q. minor (Marsh.) Sargent. 



is. Branchlets two years old glabrous. 



ji. Twigs slender light yellowish brown 

 slightly pubescent becoming lighter 

 colored in second year, buds acute 

 scarcely one-fourth inch long. 



Q. lobata Nee. 



J2. Twigs slender light yellowish-brown, 

 or minutely pubescent growing darker 

 or ashy gray in second year, buds ob- 

 tuse or acute one-eighth inch long 

 light brown. Q. gambelii Nutt. 



/3 f . Twigs stout light yellowish glabrous 

 becoming ashy gray or light brown in 

 second year, corky wings on branchlet 

 usually appear second or third year, 

 buds broadly ovate, acute or obtuse 

 one-eighth to one-quarter inch long. 



Q. macrocarpa Michx. 



Ji2. Buds glabrous or slightly or partially pub- 

 escent. 



71. Buds obtuse. 



ji. Bark on branches one inch in diame- 

 ter breaks into stiff papery sheets, 

 twigs stout light brown glabrous grow- 

 ing darker in second year, buds one- 

 eighth inch long, scales light brown 

 with pale scattered hairs near apex. 

 Q. platanoides (Lam.) Sudworth. 



