When Carl Meissner published his arrangement of "Banksia" in 1856, he demoted both of Brown's subgenera to sectional rank, maintaining "B." sect. "Isostylis" (R.Br.) Meisn. as a monospecific taxon containing only "B. ilicifolia". Meissner's rank and circumscription of "Isostylis" was retained by George Bentham in his 1870 arrangement for "Flora Australiensis", but Bentham also published a putative variety of "B. ilicifolia", "B. i." var. "integrifolia", based on specimens collected by Ludwig Preiss near the Swan River in Western Australia. This was later overturned.