34 THE LATER EXTINCT FLORAS OF NORTH AMERICA. 



JUGLANS OCCIDENTALS Newb. 

 PI. LXV, fig. 1; LXVI, figs. l-4c. 

 Proc. U. S. Nat. Mus., Vol. V (March 21, 1883), p. 507. 



"Leaves somewhat variable in form and size, from 3 to 8 inches in 

 length and 1 to 2 inches in width, but generally 6 inches long by 1 \ inches 

 wide, broad-lanceolate in outline, widest in the middle, summit acute, base 

 rounded, often unsymmetrical ; margins entire; nervation delicate; midrib 

 straight; lateral nerves, about twenty on each side, gently curved upward, 

 the lower ones branched and anastomosing near their extremities, the upper 

 simple and terminating in the margins; tertiary nervation very delicate, or 

 obscure from being buried in the parenchyma of the leaf, forming an open 

 and irreo-ular network. Fruit small, elongated, somewhat prismatic; divi- 

 sions of the envelope lenticular in outline, narrow, thin." 



The figures given of this species, collected by Dr. C. A. White, illustrate 

 very well the average size and form of the leaves. The number contained 

 in the collection is large, and they seem to have been extremely abundant 

 in the locality where they were obtained. In a few instances they are found 

 attached to the stems that bore them, but are generally separated and more 

 or less torn and broken. The tree was evidently a strong-growing and 

 luxuriant one, for some of the leaves are not less than 8 inches in length; the 

 nervation is fine and often not discernible, probably from the thickness of 

 the leaf; in some specimens, however, it is more distinct and has all the char- 

 acters of that of the genus to which the leaves have been referred. The fruit, 

 of which fortunately one specimen was found in immediate contact with 

 the leaves, is small, marked with raised lines, elongate in form, and resembles 

 more the fruit of Carya olivceformis than any other of our living species. It 

 might be inferred from the small size of the nut and its elongated form that 

 it was immature, but near it lies a segment of the envelope which has appa- 

 rently exfoliated at maturity. As only one specimen of the fruit has been 

 discovered, it is possible that it does not represent the average size and form. 

 This fruit is distinctly that of a Carya and not of a Juglans, as now defined, 

 but the leaf is more like that of the latter than the former genus. It dis- 

 tinctly falls within the old genus Juglans, but can hardly be reduced to 

 either of its subdivisions which have now been given generic value. 



A species of Juglans collected near the same locality as this has been 



