30 



Fagaceae. 



2. Buds 

 Buds 



conical-fusiform, large (8-10 mm. long). 3. 

 ovoid or conical-ovoid or else very thick. 4. 



3. Twigs glabrous. (1). Q. laevis. 

 Twigs puberulent. 



(Blackjack). Q. marilandica. 



4. Evergreen. Q. laurifolia. 

 Deciduous. 5. 



'5. Buds dull clay-colored, glab- 

 rous. (2). Q. Schneckii. 

 Buds red or brown or silky. 6. 



6. Buds large (7-10 mm.), hairy, 

 angular. (3). Q. velutina. 



Buds moderate or small. 7. 



7. Twigs tomentulose. 8. 

 Twigs glabrous. 9. 



8. Buds short (4 mm.) : glabrous. 

 (Bear oak). Q. ilicifolia. 



Buds long (3X7 mm.), silky. 

 (5). Q. cinerea. 



9. Buds small (3 mm. long), 

 glabrate. Q. georgiana. 



Buds larger or hairy. 10. 



entirely glabrous. 11. 



more or less silky, or tardily glabrescent. 



13. 



Q. nigra. 



Q. rubra. 



almost woolly, dull gray-brown. (6) 



red, relatively large (3X5 mm.). (7). 

 brown, smaller (2X3-4 mm.). 12. 



rather obtuse. (Pin oak). Q. palustris. 



very acute. (Willow oak). Q. Phellos. 



almost blood-red. (Spanish oak). Q. falcata. 



brown. (Shingle oak). Q. imbricaria. 

 brownish-red, or at first silvery-pubescent. 14. 



large (4X5-6 mm.). (8). Q. coccinea. 

 smaller (scarcely 3X4 mm.). 15. 



