A new classification of the genus Eucalyptus L'Her. (Myrtaceae)

A new formal classification of the genus Eucalyptus is presented. It divide s the genus into seven polytypic subgenera: E. subg. Angophora, E. subg. Co rymbia, E. subg. Blakella, E. subg. Eudesmia, E. subg. Symphyomyrtus, E. su bg. Minutifructa and E. subg. Eucalyptus, and six monotypic subgenera: E. s ubg. Acerosa, E. subg. Cruciformes, E. subg. Alveolata, E. subg. Cuboidea, E. subg. Idiogenes and E. subg. Primitiva. The system is intentionally phyl ogenetic, proceeding from the generally assumed primitive 'apples' (E. subg . Angophora) and bloodwoods (E. subg. Corymbia) to the most advanced and mo dified group, the monocalypts (E. subg. Eucalyptus). The genus Corymbia Hil l & Johnson is subsumed under Eucalyptus and is represented by E. subg. Cor ymbia (the bloodwoods) and E. subg. Blakella (the ghost gums). New infrageneric taxa are diagnosed and their names typified, while brief d igests in English are given for established taxa. Three species of the form er genus Angophora have names with epithets preoccupied by names of other E ucalyptus species and new names are presented for them. The study is introd uced by a brief historical summary of previous work in Eucalyptus, an apolo gia for the inclusion of Angophora, the reason for requirement of a new cla ssification and notes on the nomenclature used. A new infrageneric rank, 's upraspecies', is introduced and is intentionally divorced in application (a s a rank) from the similar sounding 'superspecies'. All species recognised by the author are named and assigned in this system.