follows: Banksia B. subg. Banksia (3 sections, 11 series, 73 species, 11 subspecies, 14 varieties) B. subg. Isostylis B. ilicifolia B. oligantha B. cuneata Since 1998, American botanist Austin Mast and co-authors have been publishing results of ongoing cladistic analyses of DNA sequence data for the subtribe Banksiinae, which then comprised genera Banksia and Dryandra. Their analyses suggest a phylogeny that differs greatly from George's taxonomic arrangement. Banksia cuneata resolves as the next closest relative, or "sister", to a clade containing B. ilicifolia and B. oligantha, suggesting a monophyletic B. subg. Isostylis; but the clade appears fairly derived (that it, it evolved relatively recently), suggesting that B. subg. Isostylis may not merit subgeneric rank. Early in 2007, Mast and Thiele rearranged the genus Banksia by merging Dryandra into it, and published B. subg. Spathulatae for the taxa having spoon-shaped cotyledons; thus B. subg. Banksia was redefined as encompassing taxa lacking spoon-shaped cotyledons. They foreshadowed publishing a full arrangement once DNA sampling of Dryandra was complete; in the meantime, if Mast and Thiele's nomenclatural changes are taken as an interim arrangement, then B. cuneata is placed in B. subg. Banksia. Phylogeny Relationships between B. cuneata and the other members of B. subg. Isostylis still remain unclear. Though Mast's studies found B. cuneata to be the most basal of the three species, a 2004 study of genetic divergence within the subgenus yielded both other possibilities: some analyses suggested B. ilicifolia as basal, while others suggested B. oligantha. Further complicating the situation is the southernmost population of B. cuneata, which has both genetic and phenetic affinities with B. oligantha located to the southeast. The origin of this population is unknown. It might have arisen through hybridisation, or it may be a transitional or even ancestral form. Finally, biogeographical factors suggest that B. ilicifolia would be the most basal of the three species: it occurs in the High Rainfall Zone where relictual species are most common, whereas the others are restricted to the Transitional Rainfall Zone, where more recently evolved species are most common. Distribution and habitat An endangered species, B. cuneata occurs only over a range around Pingelly and Quairading, in Western Australia. It favours deep yellow sand at elevations between , in woodland habitat. It often grows in association with Banksia prionotes and Xylomelum angustifolium. Reports on the number of populations and individuals vary widely. A survey in 1982 reported 450 plants