rock elm

noun

an elm, Ulmus thomasii, of eastern North America, having deeply furrowed, grayish-brown bark.
the hard, heavy wood of this tree, used for making furniture and in the manufacture of various types of containers.

Origin of rock elm

First recorded in 1820–30

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

The margin of this river, on either side, was fringed with tall stately trees, called the Rock-Elm.
Walter Harland
Harriet S. Caswell