bluewood

[bloo-woo d]

noun

a shrub or small tree, Condalia obovata, of the buckthorn family, of western Texas and northern Mexico, often forming dense chaparral.

Origin of bluewood

An Americanism dating back to 1880–85; blue + wood¹

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

Bluewood (Condalia obovata) is a related Texas species, called also logwood and purple haw.
American Forest Trees
Henry H. Gibson