a tree, Idria columnaris, native to Baja California, having spreading spiny branches, deciduous leaves, and yellow flowers.
Origin of boojum tree
1960–65; after the boojum, an imaginary creature invented by Lewis Carroll in the poem The Hunting of the Snark (1876)
Also called cirio.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019