276 



FAGACEAE 



Leaves obovate-cuneate, brown-floccose beneath. 

 Leaves spatulate to obovate, glabrous both sides. 

 Leaves entire, rarely with a very few teeth. 



Leaves smooth beneath except sometimes in the axils 



of veins. 

 Leaves pubescent beneath. 

 Leaves or their lobes not bristle-tipped; fruit maturing the first 

 season. 

 Leaves crenate or shallowly lobed. 

 Acorns sessile. 



Low tree, or usually a shrub; leaves obovate. 

 Tall trees; leaves oblong to lanceolate, rarely 

 obovate; bark close. 

 Acorns stalked. 



Peduncles shorter than the petioles, rarely as long. 

 Teeth of the leaves acute or mucronulate. 

 Teeth of the leaves rounded. 

 Peduncles much longer than the petioles. 

 Leaves deeply lobed. 



Leaves hairy, at least on the veins beneath. 



Upper scales of the cup awned, forming a fringe. 

 Upper scales not awned. 



Acorn broader than high, nut immersed in cup. 

 Acorn longer than broad, nut only J'2 immersed 

 in cup. 

 Leaves smooth and pale beneath when old; cup shallow. 



I 



9. Q. marilandica. 

 10. Q. nigra. 



1 1 . Q. Phellos. 



12. Q. imbricaria. 



i?>- 



14. 



Q. prinoides. 

 Q. Muhlenbergii. 



15. Q. Michauxii. 



16. Q. Prinus. 



17. Q. bicolor. 



18. Q. mucrocarpa. 



19. Q. lyrata. 



20. Q. stellala. 



21. Q. alba. 



Q. rubra L. In various situations: N. S. to Minn, and Kan., 

 south to Fla. and Tex. 



Throughout the range except in the pine-barrens, there wanting, 

 always increasing northward. 



2. Q. palustris Du Roi. In moist places: Mass. to Mich, and 



Mo., south to Va., Tenn. and Ind. Terr. 



Throughout the range, except in the pine-barrens and east of 

 them; increasing in the Connecticut Valley and southwestern 

 Conn. 



3. Q. velutina Lam. In dry soil: Me. to W. Ont., south to Fla. 



and Tex. 



Throughout the range. 



4. Q. borealis Michx. f. Que. and Ont. to N. Y. and Pa. and 



perhaps in the mountains to N. Car. 



Conn: Litchfield Co. 



N. Y. Highlands of the Hudson, increasing but not common 



northward. 

 N. J. Passaic Co. 

 Pa. Northampton Co. 



