 Alex George published a new taxonomic arrangement of Banksia in his landmark 1981 monograph The genus Banksia L.f. ( Proteaceae ) . Endlicher 's Eubanksia became B. subg . Banksia , and was divided into three sections , one of which was Oncostylis . Oncostylis was further divided into four series , with B. verticillata placed in series Spicigerae because its inflorescences are cylindrical . 
