FAGACEAE. 19 



pale-greeu, gray-tomeutose beneath: aeoru nearly sessile; cup saucer-shaped, 

 10-15 mm. wide; nut oblong or subglobose, about 15 mm. long. [Q. brevi- 

 folia (Lam.) Sarg.] 



The Blue-jack grows on sand-ridges and in sandy barrens in northern Florida 

 and in the ijeninsula as far south as the Evergh^de region. The l)rown or red- 

 brown heart-wood is close-grained, heavy, hard, and strong. (Cont.) 



16. Q. nigra L. Tree becoming 30 m. tall, the bark relatively smooth: leaves 

 deciduous; blades oblaneeolate to spatulate in outline, 5-15 cm. long, entire 

 and sometimes with a dilated terminal lobe, or 3-lobed at the apex, glabrous 

 beneath or sometimes sparingly tomentose: acorn sessile or short-peduncled ; 

 cup saucer-shaped, 12-15 mm. wide; nut subglobose, 10-13 mm. long. 



The Water-oak grows in sandy soil, swamps, or river-swamps in northern 

 Florida and in the northern portion of the peninsula. The brown heart-wood is 

 close-grained, heavy, hard, and strong. (Cont.) 



17. Q. marylandica Muench. Tree becoming 20 m. tall, the bark very rough: 

 leaf-blades broadly or narrowly obovate in outline, 9-16 cm. long, 3-5-lobed 

 or with a single dilated terminal lobe, brownish-pubescent beneath: acorn 

 sessile or short-stalked; cup depressed-hemispheric, 15-20 mm. wide; nut sub- 

 globose or ovoid, 10-20 mm. long. 



The Black-jack grows in dry sandy soil in northern Florida. The brown heart- 

 wood is coarse-grained, heavy, hard, and strong. Also known as Jack-oak. (Cont.) 



18. Q. triloba Michx. Tree becoming 40 m. tall: leaf -blades ovate or oval in 

 outline, finely tomentose with yellowish-gray hairs beneath, pinnatifid above a 

 rounded base into 3-7 flaring or scythe-shaped lobes: acorn short-stalked; 

 cup flat-turbinate or saucer-shaped above the turbinate base, 15-18 mm. wide; 

 nut subglobose, 10-15 mm. long. [Q. digiiata (Marsh.) Sudw.] 



The Spaxish-oak grows in dry woods in northern Florida and the adjacent 

 portion of the peninsula. The reddish heart-wood is coarse-grained, hard, and 

 strong, but not durable. (Cont.) 



19. Q. pagodaefolia (Ell.) Ashe. Tree becoming 32 m. tall: leaf -blades oval 

 to oblong in outline, 15-30 cm. long, persistently white-tomentose, pinnatifid 

 above a cuneate or truncate base into 5-13 lanceolate or narrowly triangular 

 lobes: acorn sessile or nearly so; cup shallow-turbinate, or saucer-shaped above 

 the turbinate base, 12-14 mm. wide; nut subglobose, about 10 mm. long. 



The Swamp spanish-oak grows in river-swamps and low grounds in northern 

 Florida. The reddish-brown heart-wood is rather close-grained, hard, strong, and 

 durable. (Cont.) 



20. Q. velutina Lam. Tree becoming 50 m. tall: leaf -blades oval or obovate 

 in outline, 10-30 cm. long, usually rusty-pubescent beneath, pinnately lobed, 

 the lobes spreading: acorn sessile or nearly so; cup turbinate or hemispheric- 

 turbinate, 20-25 mm. wide; nut globose-oblong or obovoid, 15-25 mm. long. 



The Black-oak grows in dry woods in northern Florida. The brown and red- 

 tinged heart-wood is coarse-grained, heavy, hard, and strong. Also known as 

 Yellow-bark oak. (Cont.) 



21. Q. Schneckii Britton. Tree becoming 65 m. tall: leaf -blades oval, vary- 

 ing to obovate in outline, 6-20 cm. long, with tufts of hairs in the vein-axils 

 beneath, pinnately 5-7-lobed, the lobes ascending, oblong or triangular, the 

 sinuses rounded: acorn short-stalked or nearly sessile; cup saucer-shaped, 

 20-30 mm. wide; nut ovoid, 12-25 mm. long. 



The Leopaed-oak grows in rich soil or river-swamps in middle and western 

 Florida. The red-brown heart-wood is coarse-grained, heavy, hard, and strong. 

 (Cont.) 



22. Q. rubra L. Tree becoming 50 m. tall: leaf-blades oval, varying from 

 ovate to obovate in outline, 10-20 cm. long, with tufts of hairs in the vein- 

 axils beneath, pinnately 5-7-lobed, the lobes ascending, the sinuses rounded: 

 acorn short-stalked; cup saucer-shaped, 25-35 mm. wide; nut ovoid, 25-30 

 mm. long. 



The Red-oak grows in dry or rocky woods in middle and western Florida. The 

 reddish-brown heart-wood is close-grained, heavy, hard, and strong. (Cont.) 



