354 FAGACEAE 



thickened except near the edge ; nut oblong or elliptic in outline, 15-25 mm. long, about 

 twice as long as the cup. [ Q. obtusiloba var. parmfolia Chapm. ] 

 In sandy barrens, chiefly near the coast, South Carolina to Florida. 



31. Quercus brevfloba (Torr. ) Sarg. A shrub often forming thickets, or a small tree, 

 the trunk clothed with a gray or silvery white bark which scales off' in thin strips. Leaf- 

 blades obovate or broadly oblanceolate, or spatulate, 4-12 cm. long, obtuse, shallowly lobed 

 above, bluish green or deep-green and shining above, densely felty tomentose with grayish 

 white hairs beneath, the lobes rounded : acorns sessile or nearly so ; cup saucer-shaped, 

 with a thin edge 10-15 mm. broad, tomentose, the scales appressed ; nut slightly obovoid, 

 10-15 mm. long. 



Chiefly in limestone soil, middle and southern Texas. SHIN OAK. 



32. Quercus prinoides Willd. A shrub or small tree, with a slender trunk and a max- 

 imum height of about 5 m. , the bark pale. Leaf-blades obovate, oblanceolate or rarely nearly 

 oblong, 5-15 cm. long, usually acute or short acuminate, coarsely toothed, cuneately nar- 

 rowed or sometimes rounded at the base, glabrous and somewhat shining above, finely gray- 

 tomentose beneath ; petioles 0.5-1. 5 cm. long : acorns sessile or nearly so ; cup hemispheric, 

 13-18 mm. broad, thin, its scales appressed, thickened on the back ; nut oblong-ovoid, 

 15-25 mm. long, more than twice as long as the cup. 



In sandy or rocky places, Maine to Minnesota, North Carolina, Alabama and Texas. CHINQUAPIN 

 OAK. SCBUB CHESTNUT OAK. 



33. Quercus acurninata (Michx. ) Honda. A handsome tree, reaching a maximum 

 height of about 50 m. and a maximum trunk diameter of 2.5 m. , the trunk clothed with a pale- 

 gray or white scaly bark. Leaf -blades varying from lanceolate to oblong- lanceolate, 5-20 cm. 

 long, mostly acuminate at the apex, coarsely serrate, with flaring or rarely depressed teeth, 

 glabrous and glossy above, glaucous, minutely pubescent or glabrate beneath ; petioles 1-3 cm. 

 long : acorns sessile or nearly so ; cup hemispheric, about 15 mm. broad, its scales thickened, 

 especially near the base ; nut ovoid, about 15 mm. long, about twice as long as the cup. 



Chiefly in limestone soil, Vermont to Ontario, Minnesota, Florida and Texas. CHESTNUT or YEL- 

 LOW OAK. 



34. Quercus Prinus L. A forest tree, reaching a maximum height of 30 m. and a 

 trunk diameter of 2m., the trunk clothed with a dark, hard, close, furrowed bark. Leaf- 

 blades oblong to oval, varying to slightly broadest above or below the middle, 15-20 cm. 

 long, coarsely crenate-serrate, dark green, glabrous and barely shining above, finely gray- 

 tomentulose beneath ; petioles 1-3 cm. long : acorns short-peduncled ; cup hemispheric, 

 12-35 mm. broad, with appressed bracts ; nut ovoid or oblong-ovoid, 25-35 mm. long, 

 with an edible but not very sweet seed. 



In rocky woods, Maine and Ontario to Georgia and Alabama. ROCK CHESTNUT OAK. 



35. Quercus Michauxii Nutt. A large tree, reaching a maximum height of 35 m. 

 and a trunk diameter of 2 m., the trunk clothed with a white or ash-gray bark which sepa- 

 rates in very thin plates. Leaf -blades obovate, varying to oblong, usually acute or short-acu- 

 minate, coarsely serrate, nearly glabrous and often shining above, finely tomentose beneath 

 with white hairs ; petioles 1-3 cm. long : acorns peduncled ; cup deep saucer-shaped or 

 shallowly hemispheric, 25-35 mm. broad, finely tomentose, the bracts broad, appressed, 

 often keeled on the back ; nut oblong or oblong-ovoid, 30-35 mm. long : seed sweet, edible. 



In swamps and damp places, Delaware to Indiana, Missouri, Florida and Texas. Cow OAK. 

 BASKET OAK. 



36. Quercus Brayi Small. A large tree, sometimes 18 m. tall, or more, with a pale 

 flaky bark. Leaves very numerous, deciduous ; blades thin, cuneate, 10-20 cm. long, 

 abruptly acuminate at the apex, regularly and coarsely sinuate-toothed nearly to the base, 

 glabrous, with relatively few regular and prominent lateral ribs, deep green above, slightly 

 paler and rather olive-green beneath ; petioles 1.5-2.5 cm. long : acorns sessile or nearly 

 so ; cup hemispheric, 20-25 mm. broad, the lower scales somewhat warty on the back ; nut 

 oblong to ovoid, 25-30 mm. long, about 1.5 cm. thick : seed rather sweet. 



In canons, central Texas. WHITE OAK. 



37. Quercus platanoides ( Lam. ) Sudw. A stately tree, reaching a maximum height 

 of 36 m. and a trunk diameter of 2.5 m., the trunk clothed with a gray or whitish flaky bark. 

 Leaf-blades obovate or oblong-obovate, 5-20 cm. long, coarsely toothed or lobed, usually 

 cuneately narrowed at the base, deep green and shining above, densely white-tomentose 

 beneath, the teeth or lobes rounded ; petioles 1-3 cm. long : acorns usually long-peduncled; 

 cup saucer-shaped or depressed-hemispheric, 20-25 mm. broad or rarely smaller, the bracts 

 mostly appressed, much narrower at the edge than at the base ; nut oblong or oblong-ovoid, 

 20-25 mm. or nearly 3 cm. long. [Q. bicolor Willd.] 



In swamps or moist places, Quebec to Maine, Iowa, Georgia, Arkansas and Missouri. SWAMP 

 WHITE OAK. 



