JUGLANDACEAE 335 



7. Hicoria alba (L. ) Britton. A forest tree, reaching a height of about 30 m. and a 

 maximum trunk diameter of nearly 1.5 m. Bark rather close, in flat ridges : foliage 

 tomentose : bud-scales imbricated : leaves ample ; leaflets 7-9, the blades oblong, oblong- 

 lanceolate, or the upper broadest above the middle, 8-13 cm. long, short-acuminate, acute 

 or rounded at the base, sessile : staminate aments in 3's, 10-15 cm. long, peduncled : fruit 

 globose or globose-obovoid, 4-6 cm. in diameter, the thick husk readily splitting to the 

 base: nuts slightly flattened, acute, angled, thick-shelled, the seed sweet. [Can/a tomentosa 

 (Lam.) Nutt.] 



In stony or rich soil, Massachusetts to Ontario and Nebraska, Florida and Texas. 



8. Hicoria laciniosa (Michx. ) Sarg. A forest tree, reaching a height of 40 m. and a 

 maximum trunk diameter of about 1.5 m. Bark separating in narrow plates : foliage 

 densely puberulent when young : bud-scales imbricated : leaves ample ; leaflets puberulent 

 beneath in age, 7-9 or rarely 5, the blades oblong, oblong-lanceolate, or the upper broadest 

 above the middle, acute or acuminate, 10-20 cm. long : staminate aments in 3's, peduncled, 

 arising from the base of the shoots of the year : fruit broadly oblong or oblong-obovoid, 

 5-8 cm. long, with a thick husk which readily splits its entire length : nut broadly oblong, 

 pointed at both ends, slightly flattened, the seed sweet. [Cai-ya sulcata Nutt] 



In rich soil, New York to Iowa, Kansas, Pennsylvania, Tennessee and the Indian Territory. KING- 

 NUT. BIG SHAG-BARK. 



9. Hicoria ovata (Mill.) Britton. A forest tree, reaching a height of 40 m. and a 

 maximum trunk diameter of 1.5 m. Bark separating in large plates : foliage pubescent 

 when young, glabrate in age : bud-scales imbricated : leaves deep green ; leaflets 5 or 

 rarely 7, the blades oval or oblong-lanceolate, 10-15 cm. long, acuminate, sessile : stami- 

 nate aments in 3's, on the shoots of the season, peduncled : fruit subglobose, 3-5 cm. thick, 

 with a thick early 4-valved husk : nut slightly flattened, pointed, slightly angled, with a 

 thin shell, the seed sweet. [Cw*ya alba Nutt.] 



In rich soil, Quebec to Minnesota, Kansas, Florida and Texas. SHELL-BARK HICKORY. SHAG-BARK. 



10. Hicoria Carolinae-septentrionalis Ashe. A forest tree, 20-40 m. tall, with a 

 deep gray bark hanging in loose strips, and slender, smooth and glaucous, purplish brown 

 twigs. Bud-scales 8-10, the inner much enlarged in unfolding : terminal bud ovoid-lanceo- 

 late, truncate : young foliage blackening in drying : leaves numerous, usually crowded at the 

 ends of the branchlets ; leaflets 3-5, the blades lanceolate, sometimes narrowly so, 6-15 cm. 

 long, glabrous, ciliate, with few resinous globules : staminate aments glabrous : fruit sub- 

 globose, 1.5-3 cm. in diameter, the husk early separating in 4 valves : nut white or brownish, 

 flattened, angled, thin-shelled, cordate or subcordate at the top, the seed sweet. 



In sandy or rocky woods or bottoms, Delaware to Kentucky, Georgia and Alabama. 



11. Hicoria microcarpa (Nutt. ) Britton. A forest tree, sometimes 25 m. tall and 

 rarely 1.5 m. thick near the base. Bark separating into thin plates : foliage glabrous in 

 age: bud-scales imbricated: leaves resembling those of H. ovata; leaflets 5-7, the blades 

 oval, oblong or ovate-lanceolate, acuminate at the apex, 6-14 cm. long, sometimes rounded 

 at the base : staminate aments in 3's, glabrous or nearly so, peduncled : fruit subglobose, 

 2-2.5 cm. in diameter, the thin husk tardily splitting : nut slightly flattened, hardly 

 angled, acute, thin-shelled, the seed sweet. 



In rich woods, Massachusetts to Michigan, Missouri and Georgia. 



12. Hicoria glabra (Mill.) Britton. A forest tree, reaching a height of 60 m., 

 with a trunk diameter sometimes over 1.5 m. Bark close, in flat ridges : foliage glabrous 

 or nearly so : bud-scales imbricated : leaves 1.5-3 dm. long ; leaflets 3-7 or rarely 9, 7-15 

 cm. long, the blades acuminate, often firm and lustrous, commonly oblong or oblong-lanceo- 

 late, usually acute at the base : staminate aments in 3's, peduncled, 6-10 cm. long: fruit 

 subglobose to obovoid or pyriform, 3.5-5 cm. long, with a thinnish, tardily separating 

 husk : nut often brown, angled, acute, thick-shelled, the seed bitter and astringent. 



In woods, Maine to Minnesota, Florida and Texas. A form with larger hirsute leaflets and larger 

 fruit is known as H. glabra hirsuta Ashe ; it ranges from Virginia to Georgia. PIG-NUT HICKORY. 



13. Hicoria villosa (Sarg.) Ashe. A small or medium-sized tree, with a deeply 

 furrowed dark gray bark and glabrous or nearly glabrous, bright purple-brown twigs. 

 Buds various, the lateral mostly short -stalked, all with 6-8 scales, the outer scales with resi- 

 nous globules : leaves 1-3 dm. long ; leaflets 5-9, the blades oblong to oblong-oval, or slightly 

 broadest above or below the middle, 8-12 cm. long, covered beneath with silvery peltate 

 scales and resinous globules, and usually pubescent : petioles and rachis pubescent : stami- 

 nate aments 5-10 cm. long, pubescent : fruit obovoid or globose-obovoid, about 2.5 cm. long, 

 the husk partly splitting : nut brown, thick-shelled, angled : seed small. 



In open woods, Missouri and Arkansas. 



