FAGACEAE. 17 



Leaf-blades glabrous except sometimes In the vein-axis 

 beneath. 

 Acorn-cup saucer-shaped, the scales narrow, the inner 

 ones not Inflexed. 

 Acorn-cup swollen at the base : leaf-blades with 



broad rounded sinuses. 21. Q. Hchncclcii. 



Acorn-cup flat at the base : leaf-blades with acute 



narrow sinuses. • 22. Q. rubra. 



Acorn-cup turbinate, the scales broad, the inner ones 



inflexed. 23. Q. Catesbaei. 



1. Q. alba L. Tree becoming 45 m. tall: leaf -blades obovate in outline, 10-20 

 cm. long, glaucous and finally glabrous beneath, pinnatifid into 3-9, usually 7, 

 ascending, narrow lobes: acorn short-stalked; cup saucer-shaped or shallowly 

 hemispheric, woody, tuberculate, 15-20 mm. wide; nut oblong-ovoid, 15-25 

 mm. long. 



The White-oak grows in rich woods in middle and western Florida. The 

 light-brown heart-wood is close-grained, very heavy and hard, strong, tough, and 

 durable. (Cont.) 



2. Q. Margaretta Ashe. Tree sometimes 10 m. tall or shrub: leaf -blades oval 

 or obovate in outline, 6-9 cm. long, more or less pubescent about the veins 

 beneath, sinuate or shallowly 3-5-lobed: acorn sessile or short-stalked; cup 

 turbinate-hemispheric, 11-14 mm. wide; nut oblong to ovoid-oblong, 12-14 

 mm. long. 



The Small post-oak grows in dry sandy woods in northern Florida. The 

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



3. Q. stellata Wang. Tree becoming 30 m. tall: leaf -blades broadly obovate 

 in outline, 10-20 cm. long, finely tomentose beneath with gray or yellowish 

 hairs, pinnatifid into usually 5 broad tliverging lobes: acorns often clustered; 

 cup hemispheric and contracted at the base, 15-20 mm. wide; nut ovoid, 15-20 

 mm. long. [Q. minor (Marsh.) Sarg.] 



The Post-oak grows in dry woods in northern Florida. The brown heart-wood 

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



4. Q. lyrata Walt. Tree becoming 35 m. tall: leaf -blades obovate or spatu- 

 late in outline, 9-17 cm. long, white-tomentose beneath, or glabrate, lyrate- 

 pinuatifid: acorn short-stalked; cup hemispheric or depressed-globose, 20-40 

 mm. wide; nut ovoid and exserted or spheroidal and nearly or wholly included 

 in the cup. 



The OvEKCTP-oAK grows in river swamps in northern Florida. The dark- 

 brown heart-wood is rather close-grained, very heavy, hard, tough, and durable. 

 Also known as Swamp white-oak. (Cont.) 



5. Q. Chapmanii Sarg. Tree becoming 10 ni. tall or shrub: leaf-blades obo- 

 vate or oblong, 5-10 cm. long, 3-lobed near the apex, or merely undulate, 

 sparingly pubescent beneath, lustrous above: acorn sessile or nearly so; cup 

 depressed-hemispheric, 15-20 mm. wide; nut oblong-elliptic, 1.5-2.5 mm. long. 



Chapaian's-oak grows in sandy soil, chiefly near the coast in northern Florida 

 and the northern portion of the peninsula. The yellow-brown heart-wood is rather 

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



6. Q. Michauxli Nutt. Tree becoming 35 m. tall, the bark flaky: leaf -blades 

 obovate, varying to oblong, 8-16 cm. long, coarsely serrate, finely tomentose 

 beneath: acorn sessile; cup deeply saucer-shaped or shallow-hemispheric, 25-35 

 mm. wide; nut oblong or oblong-ovoid, 30-35 mm. long. 



Tlie Cow-OAK grows in river swamps and damp woods in northern Florida and 

 in the northern part of the peninsula. The brown heart-wood is close-grained, 

 heavy, hard, tough, exceedingly strong, and durable. Also known as Basket-oak. 

 (Cont.) 



7. Q. Muhlenbergii Engelm. Tree becoming 50 m. tall, the bark scaly: leaf- 

 blades lanceolate to oblong-lanceolate, 5-20 cm. long, coarsely serrate with 

 usually somewhat flaring teeth, minutely pubescent beneath or glabrate: 



Trees of Florida 2. 



