APETALOUS EXOGENOUS PLANTS. 507 



mostly sessile ; aij) hemispherical, with flat scales, iiiclos- 

 ino- about one-half of the round-ovate nut. (Q. chinqua- 

 pin, VwY&\\.)—Shrub 2°-6° high; leaves 3'-4' long; nut 

 8 "-9" long. San Jacinto and eastward. 



Q. Texaxa, Buckley. Leaves ovate-oblong in outline, 

 smooth, deeply sinuate-pinnatifid, with broad, divergent 

 sinuses, 3-5 on each side, lobes. 1-3 toothed, teeth acute, 

 setaceous ; nut ovoid, oblong, acute ; cup shallow, hemi- 

 spherical, slightly turgid ; scales acute, closely appressed ; 

 hark of trunk of a dark slate-color and slightly furrowed ; 

 limbs smooth ; wood close-grained, white or of a light red- 

 color. — Tree^ 1-3 feet in diameter, and 40-50 feet high. 

 Hills in the vicinity of Austin. 



Q. DuRANDii, Buckley. Leaves obovate or lanceolate, 

 entire or slightly 3-lobed at the apex, with rudiments of 

 one or more lobes at the margins, lobes very obtuse ; when 

 mature, smooth on both sides ; acorn ovoid and often en- 

 larged toward the apex ; cu}^ very shallow, scales acute, 

 closely appressed ; leaves 3-4 inches long, 1-2 inches broad ; 

 acorns 4-f of an inch long, and about ^ an inch wide, 

 scarcely \ of an inch being included in the cup. — Tree, 

 2-3 feet in diameter, and 40-50 feet high ; hark of trunk 

 and branches light-gray, scaly, resembling the White Oak. 

 Banks of streams, Middle and Southern Texas. 



Q. San-Sabeana, Buckley. Leaves broad ovate, irregu- 

 garly and sparingly lobed, lobes very obtuse, upper surface 

 smooth and bright green, beneath glaucous and subpubes- 

 cent ; acorn oblong-ovoid ; cup shallow, -J the length of the 

 acorn ; bark of trunk and branches scaly and light gray. — 

 A large shrub or small tree, growing on limestone hills in 

 Burnet and San Saba Counties, where it is called "Shin 

 Oak." It often forms dense thickets. 



CASTANEA, Tourn. Chestnut. 

 Sterile flowers in separate clusters, in long erect cylin- 



