Etymology:"The specific epithet chosen is derived from the Latin quadri- (four) and angulus (angle) and refers to the distinctly four-sided stems of this species."
Text:"The transfer of B. anethifolia A.Cunn. ex Endl. to Cyanothamnus would result in a later homonym due to the existence of C. anethifolius Bartl. (see C. ramosus subsp. anethifolius)."