 For many years there was confusion between B. verticillata and B. littoralis ( swamp banksia ) . Until 1984 , the latter was circumscribed as encompassing what is now Banksia seminuda ( river banksia ) , which has whorled leaves like B. verticillata . Thus it was easy to perceive B. verticillata as falling within the range of variation of this broadly defined species . The confusion was largely cleared up once B. seminuda was recognised as a distinct taxon . 
