Quiz: Remember the definition of mal de mer?
also butter-nut, 1753, nut of the white walnut, a North American tree; transferred to the tree itself from 1783. The nut's color was a brownish-gray, hence the word was used (1861) to describe the warm gray color of the Southern army uniforms in the American Civil War.
A Confederate soldier
[1863+; fr the fact that many such soldiers, esp fr rural areas, were dressed in homespun colored with dye made fr butternuts]