GENUS I. 



WALNUT FAMILY. 



Hicoria aquatica (Michx. f.) Britton. 

 or Swamp Hickory. Fig. 1425. 



Water 



Jiiglans aquatica Michx. f. Hist. Arb. Am. i : 182. pi. 5. 1810. 



Carya aquatica Nutt. Gen. a: 222. 1818. 



Hicoria aquatica Britton, Bull. Torr. Club 15: 284. 1888. 



A swamp tree, attaining a maximum height of about 100 

 and a trunk diameter of 3, the bark close, the young 

 foliage pubescent, becoming nearly glabrous when mature. 

 Leaflets 9-13, lanceolate, or the terminal one oblong, long- 

 acuminate at the apex, narrowed at the base, 3'-$' long, 

 i'-i' wide, the lateral strongly falcate; staminate aments 

 and calyx as in the preceding species; fruit oblong, ridged, 

 i'-ii' long, pointed; husk thin, tardily splitting; nut oblong, 

 thin-shelled, angular; seed bitter. 



In wet woods and swamps, Virginia to Florida, west to 

 Illinois, Missouri, Arkansas and Texas. Wood soft, strong, 

 dense, dark brown ; weight per cubic foot 46 Ibs. Bitter pecan. 

 Water-bitternut. March-April. Fruit ripe Sept.-Oct. 



4. Hicoria ovata (Mill.) Britton. Shag-bark. Shell-bark Hickory. Fig. 1426. 



Juglans ovata Mill. Card. Diet. Ed. 8, No. 6. 1768. 



Carya alba Nutt. Gen. 2: 221. 1818. Not Juglans alba L. 



Hicoria ovata Britton, Bull. Torr. Club 15: 283. 1888. 



A large tree, sometimes 120 high, with a trunk di- 

 ameter of 4; bark shaggy in narrow plates; young 

 twigs and leaves puberulent, becoming glabrous. Leaf- 

 lets 5, or sometimes 7, oblong, oblong-lanceolate or the 

 upper obovate, acuminate at the apex, narrowed to the 

 sessile base, 4'-6' long, those of young plants much 

 larger, bud-scales 8-10, imbricated, the inner becoming 

 very large and tardily deciduous ; staminate aments in 

 3's, on slender peduncles at the bases of shoots of the 

 season ; bract of the staminate calyx linear, longer than 

 the lateral lobes; fruit subglobose, ii'-2$' long; husk 

 '3R thick, soon splitting into 4 valves; nut white, somewhat 

 !' compressed, 4-celled at the base, 2-celled (rarely 3- 

 celled) above, pointed, angled, thin-shelled; seed sweet. 

 In rich soil, Quebec to southern Ontario and Minnesota, 

 south to Florida, Kansas and Texas. Wood strong and 

 tough, light brown ; weight per cubic foot 52 Ibs. Walnut. 

 Sweet or white walnut. King-nut. Upland or white 

 hickory. Red-heart hickory. May. Fruit ripe Sept.-Nov. 



5. Hicoria carolinae-septentrionalis 

 Ashe. Southern Shag-bark. Fig. 1427. 



Hicoria carolinae-septentrionalis Ashe, Notes on 

 Hickories. 1896. 



A small tree attaining a maximum height of 

 about 80, and diameter of 2i, with gray bark 

 hanging in long loose strips. Bud-scales 8-10, 

 imbricated, the inner greatly enlarging in leaf- 

 ing, and tardily deciduous ; terminal bud ovate- 

 lanceolate, truncate, the scales spreading, barely 

 h' long; lateral buds oblong; twigs very slen- 

 der, J' thick, glaucous, smooth, purplish- 

 brown ; staminate aments in threes, glabrous 

 on short peduncles, at base of shoots of the 

 season ; stamens glabrous ; ovary glabrous ; 

 young foliage blackening in drying, glabrous, 

 ciliate, with few resinous globules ; leaflets 3-5, 

 the 2 upper f'-ii' wide, 4'-6' long, lanceolate; 

 lower pair often smaller; fruit subglobose, f- 

 li' long; husk soon falling into 4 pieces; nut 

 white or brownish, much compressed, angled, 

 cordate or subcordate at top, thin-shelled ; seed 

 large and sweet. 



Sandy or rocky woods, rarely entering " bot- 

 toms," Delaware to Georgia and Tennessee. 



