Genus 2. 



WALNUT FAMILY. 



583 



9. Hicoria microcarpa (Nutt.) Britton. Small-fruited Hickory. Fig. 143 1. 



Juglans alba odorata Marsh. Arb. Am. 68. 1785. 

 Carya microcarpa Nutt. Gen. 2: 221. 1818. 

 H. microcarpa Britton, Bull. Torr. Club 15: 283. 1888. 

 H. glabra var. odorata Sarg. Silva 7 : 167. pi. 354; 1895. 



A forest tree, reaching a maximum height of about 

 90 and a trunk diameter of 3J , the bark close, when 

 older separating in narrow plates, the foliage glabrous 

 throughout. Bud-scales 6-8, imbricated, the inner ones 

 somewhat enlarging; leaflets 5-7, oblong, or ovate- 

 lanceolate, acuminate at the apex, narrowed or some- 

 times rounded at the base, 3Y-S' long; staminate aments 

 glabrous, peduncled in 3's at the base of shoots of the 

 season; bract of the staminate calyx equalling or some- 

 what longer than the lateral lobes; fruit globose or 

 globose-oblong, less than 1' long, the husk thin, tardily 

 and incompletely splitting to the base; nut subglobose, 

 nearly white, slightly compressed, not angled, thin- 

 shelled, pointed; seed sweet. 



In rich woods, Massachusetts to Michigan, Virginia, 

 Georgia, Illinois and Missouri. Wood hard, strong, tough, 

 light brown. Small or little pignut. Little shag-bark. 

 May-June. Fruit ripe Sept.-Oct. 



10. Hicoria borealis Ashe. Northern Hickory. Fig. 1432. 



Hicoria borealis Ashe, Notes on Hickories. 1896. 



A small tree, with rough furrowed bark when 

 young, becoming shaggy in long narrow strips with 

 age. Bud-scales 8-10, imbricated, the inner bright- 

 colored and sericeous, enlarging in leafing and 

 tardily deciduous ; terminal bud ovate-lanceolate, i' 

 long; twigs very slender, i' thick, glabrous, bright 

 brownish red; staminate aments in 3's at base of 

 shoots of season ; bract of staminate calyx much pro- 

 longed; young foliage blackening in drying, pubes- 

 cent when young, becoming smooth, ciliate, with few 

 resinous globules on lower surface; leaflets 5, occa- 

 sionally 3, lanceolate, the upper J'-ii' wide, 3i'-6' 

 long; lower pair often smaller; fruit ovoid, much 

 flattened, I' or more long; husk very thin, rugdse, 

 coriaceous, usually not splitting; nut white, some- 

 what angled ; shell thin and elastic ; seed large, sweet 

 and edible. 



A small tree of dry uplands, growing with oaks and 

 Hicoria microcarpa of which it is, perhaps, a northern 

 race. Southern and eastern Michigan, east to Belle Isle, 

 Detroit river. 



11. Hicoria glabra (Mill.) Britton. Pig-nut Hickory 



Juglans glabra Mill. Gard. Diet. Ed. 8, No. 5. 1768. 

 Carya porcina Nutt. Gen. 2 : 222. 1818. 

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

 H. glabra hirsuta Ashe, Notes on Hickories. 1896. 



A tree, sometimes 120 high and with a trunk diam- 

 eter of 5°, bark close, rough ; foliage glabrous, or some- 

 what pubescent. Bud-scales 8-10, imbricated, the inner 

 ones enlarging; leaflets 3-7, rarely 9, oblong, oblong- 

 lanceolate or the upper obovate, sessile, acuminate at 

 the apex, mostly narrowed at the base, 3'-6' long, in 

 young plants much larger; staminate aments glabrous, 

 peduncled in 3's; lobes of the staminate calyx about 

 equal in length, the bract narrower; fruit obovoid or 

 obovoid-oblong, ii-2' long; husk thin, the valves very 

 tardily dehiscent; nut brown, angled, pointed, very 

 thick-shelled; seed astringent and bitter, not edible. 



In dry or moist woods, Maine to southern Ontario and 

 Minnesota, south to Florida and Texas. Wood hard, 

 strong, tough, rather dark brown; weight per cubic foot 

 51 lbs. Brown, red, white or black hickory. Broom- 

 hickory. May-June. Fruit ripe Oct.-Nov. 



