EUCALYPT PHYLOGENY - MOLECULES AND MORPHOLOGY

Molecular (5S rDNA spacer and chloroplast DNA RfLPs) and morphological data sets are informative at different levels of the eucalypt clade. They allow separate analysis of major subclades, the results of which, when combined, give a single, phylogenetic tree for Angophora Cav. an d Eucalyptus L'Her. For taxonomic revision, the tree supports the reco gnition of bloodwood eucalypts as monophyletic, but shows that informa l subgenus Corymbia Pryer & Johnson is paraphyletic. The tree supports recognition of three major clades within the non-bloodwood eucalypts ('eudesmids', 'symphyomyrts' and 'monocalypts') and suggests relations hips for taxa within each of these. Ovule and seed characters proved t o be most informative in the morphological data set. The phylogenetic hypothesis suggests interpretations for homoplasious morphological cha racters, including parallel evolution of sepaline and petaline opercul a (and associated stemonophore) and types of conflorescence.