=5a.= =Carya alba= variety =subcoriàcea= Sargent. Trees and Shrubs 2:207:1913. Only one tree of this variety is known in Indiana and it is located in Posey County on the bank of the cypress swamp about 13 miles southwest of Mt. Vernon. Specimens from this tree were sent to Sargent and he referred them to this variety.[23] It differs from the type in the larger size and shape of the fruit and nut. The dried fruit is 5 cm. long, oblong. The nut is oblong, 4.4 cm. long, pointed at both ends, or some nuts somewhat ovate in shape and more rounded at the base, little compressed and strongly angled; shell very thick, 5 mm. at the thinnest place; kernel very small and sweet. The nut easily distinguishes it from all forms of hickory. The author has bought hickory nuts for table use for several years from Posey County and this nut is frequently found in the assortment which shows that this variety is more or less frequent in that section. =6.= =Carya glàbra= (Miller) Spach. Black Hickory. Plate 27. Very tall medium sized trees, up to 7 dm. in diameter; bark tight, usually dark, fissures shallow on some and quite deep on others; twigs reddish-brown, glabrous, terminal buds small, ovoid, about 7-12 mm. long; ordinary leaves 2-3 dm. long; leaflets generally lanceolate, sometimes quite wide, or wider beyond the middle, prevailing number 5, the terminal usually 11-19 cm. long, somewhat pubescent on unfolding, more or less pubescent below at maturity, usually only the midrib, axils and larger veins with hairs; fruit generally smooth and obovoid, rarely globose or oval, 22-40 mm. long; husk sometimes not opening, more often one or more of the sutures open to less than half way, 1-2 mm. thick; nut about 20-30 mm. long and 16-25 mm. wide, rounded at the apex, elongated and rounded at the base, angles wanting or obscure; shell very hard and thick, about 1.5 mm. thick at the thinnest point; kernel sweet and astringent; wood and uses same as that of the shellbark hickory. [Illustration: Plate 27. CARYA GLABRA (Miller) Spach. Black Hickory. (× 1/2.) Fruit from different trees to show variation.]