A species of hickory.

1

1817.  On the prairie [the timber is], post oak (Quercus obtusiloba) black jack (Quercus nigra), and shell bark hickory, (Juglans squamosa.)—John Bradbury, ‘Travels,’ p. 257.

2

1832.  [The Indians used] chesnuts, shellbarks, walnuts, persimons, huckleberries, &c.—Watson, ‘Historic Tales of New York,’ p. 54.

3

1840.  [He] made me run like a leg treasurer, when he came nigh catching me stealing nuts off a shell-bark tree, in his grounds.—E. S. Thomas, ‘Reminiscences,’ i. 271 (Hartford, Ct.).

4