A Classification of the Eucalypts

Abstract

A new classification is presented of all taxa of EuaaZyptus (and Angophora) (Myrtaceae Leptospermoideae), on the basis of studies from many disciplines and extensive field experience. This is not in the traditional revisionary form and formal nomenclatural innovations at the species and subspecies level will follow later. Infrageneric classification into subgenera, sections, series, and subseries follows a rationalised plan explicitly divorced from the traditional system embodied in the International Code of Botanical Nomenclature. This is accompanied by an equivalent and flexible system using 1-to 6-letter coded designations for taxa of the various ranks, which embodies the whole classificatory structure. There is a comprehensive index to specific and infraspecific names. Discussion covers the kinds of evidence used, the inflorescence, the operculum, the ovule, and the seed, as well as genetic behaviour, the range of variation-patterns found, and the case for recognition of segregate genera. Recognition of two (only) such genera (EuaaZyptus s. str. and Symphyomyrtus) as proposed by some recent authors is considered oversimplified and contrary to the evidence.Although division into a number of genera may perhaps be desirable in the future, it seems best at present to consider all the eucalypts as constituting a single genus with eight subgenera.Angophora would logically be included as one of these but, to avoid possible future reversals, its generic status •is not • formally reduced at this• stage; IX L 1.

Variation in the Eucalyptus gunnii-archeri Complex. III. Reciprocal Transplant Trials

“…This is common in Eucalytpus (Pryor 1959b(Pryor , 1976Pryor and Johnson 1971) and is well recognized at the species level (e.g. Moore 1959;Parsons and Specht 1967;Parsons 1968Parsons , 1969Ashton 1976Ashton , 1981) and the popu-lation level (e.g.…”

“…gunnii (sens. Pryor and Johnson 1971;i.e. 'divaricata' morph, Potts and Reid 1985a) and is associated with the transition from a subalpine, mixed eucalypt /rainforest or closed scrub habitat on the northern scarp of the Western Tiers to the open woodland habitat bordering the extensive 'frost hollows' around Great Lake.…”

Unilateral Cross-Incompatibility in Eucalyptus: the Case of Hybridisation Between E. globulus and E. nitens

“…Firstly, although E. globulus and E. nitens differ markedly in flower morphology, they are relatively closely related being grouped in the same subseries (Subseries Globulinae, Series Viminales, Section Maidenaria, after Pryor and Johnson 1971). When flower sizes are comparable, no barriers to seed-set in wider crosses within or even between series within the section Maidenaria have been reported (e.g.…”

Eucalyptus saxicola (Myrtaceae), a new species from the Central Tablelands of New South Wales (section Maidenaria series Bridgesianae)

“…Notes: bilobed cotyledons, axillary inflorescences and versatile anthers place E. saxicola within the Section Maidenaria, while sessile and ovate juvenile leaves and the annular disc of the fruit place the species within the Series Bridgesianae (Pryor & Johnson 1971). The fibrous persistent bark and the distinctly crenulate juvenile leaves allies this species with Eucalyptus angophoroides and E. bridgesiana (Chappill & Ladiges 1996).…”