Recent Developments
Since 1998, Austin Mast has been publishing results of ongoing cladistic analyses of DNA sequence data for the subtribe Banksiinae. His analyses suggest a phylogeny that is rather different to previous taxonomic arrangements. All previous circumscriptions of B. ser. Banksia appear to be polyphyletic. Bentham's circumscripion is widely polyphyletic, and both George's and Thiele and Ladiges' circumscription bring together species that occur in three widely separate clades in Mast's cladogram. Thiele's B. subser. Banksia is monophyletic but is most closely related to B. ser. Ochraceae and B. ser. Prostratae; B. baxteri (Baxter's Banksia) and B. speciosa (Showy Banksia) form a clade alongside B. coccinea (Scarlet Banksia); and the remaining species in Thiele and Ladiges' circumscription form a third clade with B. ashbyi (Ashby's Banksia) and B. lindleyana (Porcupine Banksia).
Early in 2007 Mast and Thiele initiated a rearrangement of Banksia by transferring Dryandra into it, and publishing B. subg. Spathulatae for the species having spoon-shaped cotyledons; in this way they also redefined the autonym B. subg. Banksia. All members of B. ser. Banksia fall within Mast and Thiele's B. subg. Banksia, but no more detail has been published. Mast and Thiele have foreshadowed publishing a full arrangement once DNA sampling of Dryandra is complete.
Read more about this topic: Banksia Ser. Banksia
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