840 



FAGACEAE (BEECH FAMILY) 



white-tomentose hrneath or at length smoothish, 

 the lobes triangular to oblong, acute or obtuse, 

 entire, or sparingly toothed ; cup round-ovoid, 

 thin, with rugged pointed scales ; acorn about 2 

 cm. long. — River swamps, N. J. to Ind., Mo., 

 and south w. Fig. 672. 



4. Q. macrocarpa Michx. (Bur O., Over- 

 cup or MossY-cup 'O. ) Leaves obovate or oblong, 

 lyrately pinnatifid or deeply sinuate-lobed, or 

 nearly parted, sometimes nearly entire, irregular, 

 downy or pale beneath ; the lobes sparingly and 

 obtusely toothed, 



or the smaller ones 

 entire; cup deep, 

 thick and woody 

 (2-5 cm. across), 

 loith hard and thick 

 pointed conspicu- 

 ously imbricated 

 scales, the upper 

 672. Q. lyrata. ^^^^^ avmed, usu- 



ally making a mossy-fringed border ; acorn broadly 

 ovoid, half immersed in or entirely inclosed by the 

 cup. — Rich soil, N. S. to Man., s. to w. Mass., 

 Ky., and Tex. — A large and valuable tree ; ex- 

 tremely variable in the size and fringe of the 



Fig. 673. Var. 



OLIVAEFORMIS (MichX. f.) 



small sub- 



67'3. Q. matfrocarpa. 



cups. 



Gray is a narrower-leaved form with 



cylindric acorns. 



5. Q. bicolor Willd. (Swamp White 0.) Leaves 

 obovate or oblong-obovate, wedge-shaped at base, 

 coarsely sinuate-crenate and often rather pinnati- 

 fid than toothed, usually soft-downy and white-hoary beneath, the primary veins 

 lax and little prominent ; cup \-\ as long as the acorn, woody, the upper scales 

 awn-pointed, sometimes forming a mossy-fringecj 



margin ; acorn 2-3 



cm. long. {Q. 



platanoides Sud- 



worth.) — Borders 



of streafns and 



swamps, s. Me. to 



Ont., Minn., and 



southw. — A large 



tree, with flaky 



bark. Fig. 674. 

 6. Q, Michauxii 



Nutt. (Basket O., 



Cow ().) Leaves 



oval or obovate, 



acute, obtuse, or 



even cordate at 



base, regidarly 



dentate (seldom 



deeply), rather 



rigid, commonly 

 tomento.se beneath; stamens usually 10; fruit 

 short-i)e(luncled ; cup shallow, tuberculate with 

 hard and stout acute scales, tips of the inner- 

 ?nost (iftrn t'oiMning a stiff fringe; acorn ovoid- 



Q. bicolor. 



subcylindric, twice as 



high 



as the cup, about 



675. Q. Michauxii. 



