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This study shows that [I ve genera are represented in Australia. Acmena: seven species and one subspecies, including two new species, A. mackinnoniana and A. resa, and one new subspecies, A. hemilampra subsp. orophila. Acmenosperma: two species, including one new species, A. pringlei. Eugenia: one species. Syzygium: 52 species and three subspecies, including 16 new species, S. alatoramulum, S. alliiligneum, S. argyropedicum, S. bamagense, S. boonjee, S. canicortex, S. dansiei, S. endophloium, S. macilwraithianum, S. papyraceum, S. pseudoJastigiatum, S. rubrimolle, S. sharonae, S. velae, S. wesa, S. xerampelinum, and one new subspecies, S. forte subsp. potamophilum; 23 new combinations also made. Waterhousea gen. nov.: four species, including two new species, W. mulgraveana and W. unipunctata; two new combinations also made.

Summary Preparatory to the use of volatile oils in systematic studies of Australian rainforest trees, the extent and systematic significance of seasonal variation in volatile oil composition were studied. Monthly samples were taken from eight trees of Lauraceae, representing six genera, over a period of 14 months; three of these trees were Litsea leefeana. It was found that the patterns of variation shown by these trees over the sampling period varied between trees, and in each case appeared to be unrelated to any seasonal trend. An analysis of the variation within the three trees of Litsea leefeana showed only seven compounds varying significantly by month of sampling, while 65 varied significantly by tree. Of the former, only one compound exceeded 0.5%. These three trees remained clearly distinct in any multivariate analysis. Monthly samples taken from a tree of Syzygium canicortex (Myrtaceae) over a period of 13 months were compared with single samples from nine other trees of this species. It was found that the variation within the one tree over the seasonal sampling period was less than the variation between trees. Thus it is concluded that seasonal variation presents no problems for sampling of Australian rainforest trees for volatile oil composition, and that samples can be taken at any time of the year.

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4883) 1988. New taxa of rainforest Myrtaceae from northern Queensland. Telopea 3(2): 257-271.-Three new genera, Barongia, Sphaerantia and Mitrantia, are described together with the new species B. lophandra, S. discolor, S. chartacea and M. bivalvis. In addition to these, two further species of Ristantia Wilson & Waterhouse are described: R. gouldii and R. waterhousei. All the taxa are illustrated, and their affinities discussed.

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Storckiella australiensis J. H. Ross & B. P. M. Hyland sp. nov. is described from the Cook District of northern Queensland and the characters that distinguish it from other species are given. This constitutes the first record of the genus Storckiella Seeman for Australia.