324 FLORA. 



Bark close, rough ; leaflets 7-9. 



Foliage persistently stellate-pubescent ; staminate aments stellate-woolly. 



7. H. alba. 

 Mature leaves glabrous, or nearly so ; staminate aments slightly pubescent. 



8. H.pallida. 

 Husk of fruit thin, not freely splitting to the base ; lobes of the staminate calyx 



mostly nearly equal. 



Fruit nearly globular; nut thin-shelled; bark, at least that of old trees, separat- 

 ing in strips. 



Fruit little flattened ; middle lobe of staminate calyx short. 



9. H. microcarpa. 

 Fruit much flattened; middle lobe of staminate calyx long. 



10. H. borealis. 

 Fruit obovoid; nut thick-shelled ; bark close. 



Foliage nearly or quite glabrous. n. H. glabra. 



Foliage with silvery peltate glands. 12. H. villosa. 



1. Hicoria Pecan (Marsh.) Britton. PECAN. (I. F. f. 1151.) A large tree, 

 with rough bark. Young twigs and leaves pubescent; mature foliage nearly gla- 

 brous; bud-scales few, small; leaflets 11-15, oblong-lanceolate, short-stalked, 

 inequilateral, acuminate, 1-1.8 dm. long; staminate aments sessile or nearly so, 

 1.2-1.5 dm. long; middle lobe of the staminate calyx linear, much longer than the 

 oblong lateral ones; fruit oblong-cylindric, 3-6 cm. long; husk thin, 4-valved; nut 

 smooth, oblong, thin-shelled, pointed, 2-celled at base, dissepiments thin, very 

 astringent; seed delicious. In moist soil, especially along streams, Ind. to Iowa, 

 Mo., Ky. and Tex. April -May. Fruit ripe Sept. -Oct. 



2. Hicoria minima (Marsh.) Britton. BITTER-NUT. SWAMP HICKORY. (I. F. 

 f. 1152.) A slender tree, the bark close, rough. Bud-scales 6-8, small, caducous; 

 young foliage puberulent; leaflets 7-9, sessile, long-acuminate, 0.7-1.5 dm. long, 

 1-3 cm. wide, the lateral ones falcate; staminate aments slightly pubescent; lobes 

 of the staminate calyx about equal, the middle one narrower; fruit subglobose, nar- 

 rowly 6-ridged, 2-3.5 cm - * n diameter; husk thin, tardily and irregularly 4-valved; 

 nut short-pointed, 1.5-2.5 cm. long, thin-shelled. In moist woods and swamps, 

 Quebec to Ont., Minn., Fla. and Tex. May-June. Fruit ripe Sept. -Oct. 



3. Hicoria aquatica (Michx. f.) Britton. WATER HICKORY. (I. F. f. 1153.) 

 A swamp tree, the bark close, the young foliage pubescent, becoming nearly gla- 

 brous when mature. Leaflets 9-13, lanceolate, or the terminal one oblong, long- 

 acuminate at the apex, -narrowed at the base, 0.7-1.3 dm. long, 1-2.5 cm. wide, the 

 lateral strongly falcate; staminate aments and calyx as in the preceding species; 

 fruit oblong, ridged, 2-3.5 cm - l n g> pointed; husk thin, tardily splitting; nut oblong, 

 thin-shelled, angular. In river swamps, Va. to Fla., 111., Ark. and Tex. March- 

 April. Fruit ripe Sept. -Oct. 



4. Hicoria ovata (Mill.) Britton. SHAG-BARK. SHELL-BARK HICKORY. (I. F. 

 1154.) A large tree; bark shaggy in narrow plates; young twigs and leaves 

 puberulent. Leaflets 5, or sometimes 7, oblong, oblong-lanceolate or the upper 

 obovate, acuminate at the apex, narrowed to the sessile base, 1-1.5 dm. l n g> those 

 of young plants much larger; bud-scales 8-10, the inner becoming very large; fruit 

 subglobose, 2.5-5.5 cm - l n g: husk thick, soon splitting; nut white, somewhat com- 

 pressed, 4-celled at the base, 2-celled (rarely 3-celled) above, pointed, slightly 

 angled, thin-shelled. In rich soil, Quebec to Ont., Minn., Fla., Kans. and Tex. 

 May. Fruit ripe Sept. -Nov. 



5. Hicoria Carolinae-septentrionalis Ashe. SOUTHERN SHAG-BARK. (I. F. 

 f. H54a.) A tree, with gray bark hanging in loose strips. Bud-scales 8-io, the 

 inner greatly enlarging in leafing; terminal bud ovoid-lanceolate, truncate; twigs 

 slender, glaucous, smooth, purplish brown; staminate aments glabrous; young 

 foliage blackening in drying, glabrous, ciliate, with few resinous globules; leaflets 

 3-5; fruit subglobose, 1.5-3 cm. long; husk soon falling into 4 pieces; nut white or 

 brownish, much compressed, angled, cordate or subcordate at top, thin-shelled. 

 Sandy or rocky woods, Del. to Ga. and Tenn. 



6. Hicoria laciniosa (Michx. f.) Sarg. BIG SHAG-BARK. KING-NUT. (I. F. 

 1155.) A large tree, the bark separating in long narrow plates, the young foliage 

 densely puberulent, the mature leaves somewhat so beneath. Leaflets 7-9 (rarely 

 5), acute or acuminate, sometimes 2 dm. long; middle lobe of the staminate calyx 



