| Abstract: | This is a criticism of Dahlgren's recent classification of angiosperms (1980) and his basic diagram of angiosperm phylogeny. The first is shown to include unnatural orders and super-orders; the second is accordingly as questionable. Basic factors for phylogenetic taxonomy in the angiosperms are considered. Leptocauly leads to parallel evolution and specific multiplication. Nomenclatural artifices for taxonomic equivalence are exposed; the name 'pseudon' is suggested for a conjectural taxon. |
