446 cufuLiFERyE. (OAK FAMILY.) 



2. LEUCOBALANUS. (WHITE OAKS.) Bark pale, and mostly scaly: wood 

 tough: leaves not bristle-pointed, their lobes commonly obtuse: nut smooth 

 within: stamens 6-8: stigmas sessile: abortive ovules at the base of the seed: 

 fruit annual. 



* Leaves deciduous. 



H- Leaves sinuate-lobed. 



15. Q. stellata, Wang. (Post OAK.) Leaves with 5-7 broad rounded 

 or notched lobes separated by wide open sinuses, narrowed at the base into a 

 short petiole, pubescent beneath ; cup hemispherical, enclosing one third or 

 one half of the oval nut. Cold clayey soil, Florida, and northward. A tree 

 40 - 50 feet high. Nut %' long. Leaves 4' - 6' long. 



Var. parvifolia. Leaves smaller (H' - 3' long), oblong, obtuse, entire or 

 sinuate-toothed, nearly smooth on both sides, rusty-pubescent, like the branch- 

 lets, when young ; nut larger. Sandy soil near the coast. A shrub or 

 small tree. 



16. Q. alba, L. (WHITE OAK.) Leaves oblong or obovate-oblong, with 

 7-9 mostly obtuse and entire narrow lobes separated by narrow sinuses, nar- 

 rowed into a petiole, densely tomentose, like the branchlets, when young, at 

 length smooth or glaucous beneath ; fruit large, nearly sessile ; cup hemi- 

 spherical, enclosing one third of the oblong-ovate nut. Damp woods. A 

 large tree with white bark. Leaves 4' -6' long. Nut about 1' long. 



17. Q. macrocarpa, Michx. (MOSSY-CUP OAK.) Leaves thin, obovate- 

 oblong, pubescent or pale beneath, acute at the base, short-petioled, slightly 

 or strongly few - many-lobed ; the lobes rounded, entire or obtusely -toothed ; 

 fruit large; scales of the cup thick, the upper ones produced into long awns; 

 nut ovoid, included, or half enclosed in the cup. Woods and river banks, 

 Tennessee, and westward. A middle-sized tree. Leaves 6' -15' long. Nut 

 I'-H'long. 



18. Q. lyrata, Walt. (OVER-CUP OAK.) Leaves crowded at the end of 

 the branchlets, obovate-oblong, acute at the base, 7 - 9-lobed, white-tomentose 

 beneath, or at length smoothish, shining above, the lobes triangular, acute, 

 and entire ; fruit sessile : cup round-ovate, with rugged scales, almost cover- 

 ing the roundish nut. River-swamps, Florida to North Carolina. A large 

 tree. Leaves 5'-*' long, short-petioled. Fruit 1' long. 



t- -f- Leaves toothed. 



19. Q. prinus, L. (SWAMP CHESTNUT OAK.) Leaves oblong or obo- 

 vate-oblong, obtuse, with rounded teeth, smooth and shining above, pale and 

 pubescent beneath, acute at the base, short-petioled ; fruit large, short-pedun- 

 cled ; cup hemispherical, rugged with tubercular scales, enclosing the base of 

 the roundish or oblong-ovate nut. Low grounds. A large tree. Nut about 

 1' long. 



20. Q. Michauxii, Nntt. Leaves rather rigid, oblong, obtuse or cor- 

 date at the base, the teeth short and rounded, velvety beneath ; fruit very 

 large, short-peduncled ; scales of the hemispherical cup tubercular ; nut ob- 

 long-ovate. Low ground and river swamps, chiefly in the lower districts. 

 A large tree, with flaky bark. Leaves 4' - 5' long. Nut 1 1' long. 



