JUGLANDACEAE OF THE UNITED STATES. 41 
Nussbaumer hybrid, after Mr. J. J. Nussbaumer, of Okaw- 
ville, Ill., who first brought it to the attention of Judge 
Samuel Miller, of Bluffton, Mo. Mr. Nussbaumer writes 
me that the original tree, which stands in the bottom be- 
tween Mascoutah and Fayetteville, Ill., in general appear- 
ance resembles Jaciniosa, though the bark is intermediate 
between that of the Pecan and Mockernut. Professor 
Sargent states (Silva, vii. 158) that a small tree grown 
from this in New Jersey by Mr. Fuller, cannot be distin- 
guished from Jaciniosa of the same age; and I should 
hardly be able to distinguish an imperfect twig froma 
small tree, cultivated by Judge Miller, from Jaciniosa. 
The nut, however, is very peculiar, being more elongated 
than is usual in that species, and widened upwardly, less 
acutely angled ‘‘as if the ridges had been sandpapered 
down,’’ and so thin shelled that it can be crushed easily 
by pressing two together in the palm of the hand. A 
somewhat similar nut, originally from Indiana, was 
described by Mr. Fuller in the New York Weekly 
Tribune, July 9, 1892 (Sargent’s Silva, 7. c¢.) as culti- 
vated by Mr. R. M. Floyd, of Cedar Rapids, Iowa. And 
in the autumn of 1895, Dr. J. Schneck sent me ample 
fruit, twig and leaf specimens of a similar hickory from 
Posey County, Indiana. The nut of this last is almost 
identical with a specimen of the Nussbaumer nut in the 
Engelmann herbarium, while its twigs closely resemble 
those of lJaciniosa, and the leaves are decidedly of the 
Pecan type. Iam led to the conclusion, therefore, that 
these several forms really represent hybrids between #7. 
Pecan and H. laciniosa. In size, quality, and thinness of 
shell, they appear to be the most valuable of American 
nuts.— Pl. 22, 23, f. 6-9. 
10. H. ovata (Miller) Britton. Carya alba, Nuttall.— 
The Shagbark or Shellbark.— A large tree; bark loosely 
flaking in large scales, the base of old trees merely 
checked; twigs slenderer, gray often tinged with red, only 
