In 1870, George Bentham published a thorough revision of "Banksia" in his landmark publication "Flora Australiensis". In Bentham's arrangement, the number of recognised "Banksia" species was reduced from 60 to 46. Bentham observed that the characteristics Brown used to define "B. australis", "B. depressa", "B. patula", and "B. insularis" were unable to distinguish separate forms as more specimens came to light, and hence declared them synonyms of "B. marginata". Meissner's four series were replaced by four sections based on leaf, style and pollen-presenter characters. "B. marginata" was placed in section "Eubanksia" along with "B. integrifolia" and "B. dentata".