In Canto One of his poem John Shade (the poet in VN’s novel Pale Fire, 1962) mentions his favorite young shagbark tree:
I had a favorite young shagbark there
With ample dark jade leaves and a black, spare,
Vermiculated trunk. The setting sun
Bronzed the black bark, around which, like undone
Garlands, the shadows of the foliage fell.