A Bud and Twig Key 15 



J2. Bark not forming papery plates. 



ki. Buds glabrous dark red-brown one- 

 eighth inch long, broadly ovate ob- 

 tuse, twigs slender red and lustrous 

 or coated with glaucous bloom be- 

 coming ashy gray in second year. 

 Plate V. Q. alba Linn. 



k2. Buds tomentose near margin of 

 scales, light brown obtuse, twigs 

 slender glabrous grayish brown be- 

 coming ashy gray or light brown, 

 buds one-eighth inch long. 



Q. lyrata Walt. 



12. Buds acute. 



ji. Bud-scales with scarious margins. 



ki. Scales erose light brown lustrous, 

 buds acute one-eighth inch long, 

 twigs slender glabrous light brown 

 growing darker in second year. 



Q. itnbricaria Michx. 



k2. Bud-scales entire brown, margin 

 light, bud acute one-eighth inch to 

 nearly one-fourth inch long, twigs 

 slender glabrous light brown be- 

 coming darker in second year. 

 Q. acuminata (Michx.) Houba. 



js. Bud-scales without scarious margins. 



ki. Twig stout pubescent dark brown 

 becoming brown or gray in second' 

 year, buds acute one-eighth to one- 

 fourth inch long bright brown 

 scales minutely pubescent. 



Q. diaitata (Marsh.) Sudworth. 



