 Since 1998 , American botanist Austin Mast has been publishing results of ongoing cladistic analyses of DNA sequence data for the subtribe Banksiinae , which includes Banksia . With respect to B. prionotes , Mast 's results are fairly consistent with those of both George and Thiele and Ladiges . Series Crocinae appears to be monophyletic , and B. hookeriana is confirmed as B. prionotes ' closest relative . Overall , however , the inferred phylogeny is very different from George 's arrangement . Early in 2007 , Mast and Thiele initiated a rearrangement of Banksiinae by publishing several new names , including subgenus Spathulatae for the species of Banksia that have spoon @-@ shaped cotyledons ; in this way they also redefined the autonym B. subgenus Banksia . They have not yet published a full arrangement , but if their nomenclatural changes are taken as an interim arrangement , then B. prionotes is placed in subgenus Banksia . 
