224 



The Hickories 



Bark shagg>', at least when old; fruit subglobose to oblong. 

 Fruit little flattened; bract of staminate calyx short. 

 Fruit much flattened; bract of staminate calyx long. 

 Bark close, not shaggy; fruit more or less obovoid. 



Foliage glabrous or little pubescent; bract of staminate 



calyx sometimes elongated; anther-sacs acute. 

 Foliage pubescent or scurfy; bract of staminate calyx short, 

 blunt; anther-sacs obtuse. 



11. H. microcarpa. 



12. H. boreal is. 



13. H. glabra. -^ 



14. H. villosa. 



I. NUTMEG HICKORY Hicoria myristicaeformis (F. A. Michaux) Britton 



Juglans myristicccformis F. A. Michaux. Carya myristiccEformis Nuttall 



This Hickory grows in rich soil on the borders of streams and swamps, occur- 

 ring from South Carolina to Alabama, Mississippi, Arkansas and Texas, and 

 adjacent Mexico. Its maximum height is 35 meters, with a trunk diameter of i 

 m.; it is called Bitter walnut in Louisiana. 



The trunk is tall and straight, the branches mostly stout, somewhat spreading. 



The bark is 12 to 18 mm. thick, shal- 

 lowly fissured into irregular, close, 

 dark reddish brown scales. The twigs 

 are slender, covered with brownish or 

 yellowish scales, hairy, soon becoming 

 smooth, light brown or gray and finally 

 dark brown, with triangular leaf scars. 

 The terminal bud is broadly ovoid, 3 

 to 6 mm. long, rather blunt, covered 

 by scurfy, thick scales; the axillary 

 buds are much smaller and pointed. 

 The leaves are i to 3 dm. long, with 

 slender, slightly grooved scurfy leaf- 

 stalks. The leaflets, 5 to 9 in num- 

 ber, are thin, firm, short-stalked, or 

 nearly sessile, obovate to ovate-lan- 

 ceolate, 5 to 12 cm. long, slightly 

 curved, unequally tapering or some- 

 what rounded at the base, sharp or 

 Nutmeg Hickory. taper-pointed, rather coarsely toothed 



on the margin; the terminal leaflet is symmetrical and tapers into a winged stalk; 

 they are dull green and shining on the upper surface, paler and with more or 

 less hairy and scurfy midribs beneath. The staminate catkins are 6 to 10 cm. 

 long on a short peduncle; the bracts of the flowers are ovate, sharp-pointed, twice 

 as long as the ovate rounded lobes of the perianth; stamens 6; anthers oblong, 

 notched at the top. The pistillate flowers arc oblong, scurfy hairy. The fruit is 

 nearly cylindric or elliptic-obovoid, 2.5 to 3.5 cm. long, prominently 4-ridged; 



Fig. 182. 



