1853 232 The hickory elm should be preserved for wagons.
1905 J. E. Rogers i. xxviii. 235 ‘Rock elm’ and ‘hickory elm’ refer to the hardness of its wood.
2007 (U.S. Dept. Agric.) (rev. ed.) i. 6/1 Six species of elm grow in the eastern United States... Rock elm [is also known] as cork and hickory elm.