503 
Systematic studies in the eucalypts. 10. 
New tropical and subtropical eucalypts from 
Australia and New Guinea 
(Eucalyptus, Myrtaceae) 
K.D. Hill and L.A.S. Johnson* 
Abstract 
Hill, K.D. and Johnson L.A.S., (National Herbarium of Neiu South Wales, Royal Botanic Gardens, 
Sydney, Australia 2000) 2000. Systematic studies in the eucalypts. 10. New tropical and subtropical 
eucalypts from Australia and Neiv Guinea (Eucalyptus, Myrtaceae). Telopea 8(4): 503-539. New 
species described are Eucalyptus biterranea, E. macta, E. grisea, E. pantoleuca, E. glomericassis, 
E. kenneallyi, E. costuligera, E. epruinata, E. limitaris, E. tephrodes and E. xerothermica. New 
subspecies are recognised in E. leucophloia Brooker (subsp. euroa), E. oligantha Schauer (subsp. 
modica), and E. pruinosa Schauer (subsp. tenuata). All new taxa fall within subgenus 
Symphyomyrtus, in the three sections Transversaria, Exsertaria and Adnataria. New taxa are 
mapped, and keys are presented in cases where existing keys will not discriminate taxa. Selected 
taxa are illustrated. 
Introduction 
New taxa described here are tropical species from the three sections Transversaria, 
Exsertaria and Adnataria of subgenus Symphyomyrtus of the genus Eucalyptus taken in 
the sense of Hill and Johnson (1995), excluding the genus Corymbia as discussed 
therein. The new taxa are from New Guinea and tropical regions of Queensland, 
Northern Territory and Western Australia. Several of these taxa are treated as 
undescribed species or subspecies in the semi-popular account of tropical taxa by 
Brooker and Kleinig (1994). Our new taxa, discussed both here and by Brooker and 
Kleinig were delineated by us during a comprehensive revisionary study of the 
eucalypts, and were freely discussed with Ian Brooker in order to allow the treatment 
in Brooker and Kleinig. 
Terminology and nomenclature are as in previous papers in this series (see Hill & 
Johnson 1995). Rare or threatened species are allocated conservation status codes 
according to the system of Briggs and Leigh (1996). Species authorship is to be cited as 
presented under each taxon described. They are not cases for the use of 'ex'. Keys are 
presented in cases where existing keys will not discriminate taxa, either as 
dichotomous keys or comparative tables. In other cases, distinctions are given that 
separate the new taxa from species that can be identified using the keys presented by 
Chippendale (1988), Brooker and Kleinig (1994) and Pryor et al. (1995). 
Interpretation of E. kenneallyi and the extra-Australian taxa is from herbarium material 
only; other taxa have been interpreted on the basis of both herbarium collections and 
field observations of populations in situ. 
t Deceased 1 August 1997. 
