The taxonomy of Banksia integrifolia has a long and complex history, the result of confusion caused by the species' great variability, and similarities with some closely related species. The existence of hybrids between B. integrifolia and related species as well as early attempts to classify the species based on dried specimen material have also contributed to the confusion. The species is divided into three subspecies: B. i. subsp. compar, B. i. subsp. integrifolia, and B. i. subsp. monticola. Recent molecular studies support this division.