Miscellaneous taxonomic and nomenclatural notes for Myrtaceae

Snow, N. & Veldkamp, J.F. (2010).Miscellaneous taxonomic and nomenclatural notes for Myrtaceae.Austrobaileya 8(2): 177-186.Typifications are provided for Psidium cattleianum Sabine and P. guineense Sw. from Brazil and the Caribbean respectively.Episyzygium oahuense Suess.& A.Ludw. is confirmed as being a synonym of Psidium cattlieanum, not of Eugenia.Two varieties of P. cattleianum from Brazil are reduced to synonymy.New combinations are made in Gossia, Syzygium and Xanthomyrtus for a number of species from Malesia and Melanesia.For Syzygium these include S. thompsonii (Merr.)N. Snow (including Eugenia trukensis Hosokawa, syn.nov.) based on E. thompsonii Merr.; S. bifarium (Wall.)Veldk.based on E. bifaria Wall., which is neotypified; and S. melastomatifolium (Blume) Veldk., which is based on Jambosa melastomatifolia Blume.Xanthomyrtus kanalaensis (Hochr.)N.Snow comb, nov., based on E. kanalaensis Hochr., is the older and correct name for the endemic species on New Caledonia formerly known as X. hienghenensis Guillaumin.New combinations for Melanesian species of Gossia are provided, including G. alaternoides (Brongn.& Gris) N.Snow, G. alaternoides var.conspicua (Vieill.ex Guillaumin) N.Snow), G. alaternoides var.pulchrifolius (Guillaumin) N.Snow, G. aphthosa (Brongn.& Gris) N.Snow, G. clusioides (Brongn.& Gris) N.Snow, G. colnettiana (Guillaumin) N.Snow, G. diversifolia (Brongn.& Gris) N.Snow, G. kuakuense (Vieill.ex Guillaumin) N.Snow (an older name for a basionym for the species recently known in New Caledonia as Austromyrtus cataractarum).G. nigripes (Guillaumin) N.Snow, G. pancheri (Brongn.& Gris) N.Snow, G. vieillardii (Brongn.& Gris) N. Snow (which is shown to be the same taxon as the later named G.aneityensis (Guillaumin) N.Snow in Vanuatu), and G. virotii (Guillaumin) N.Snow.An expanded description based on fruiting material is provided for Rhodomyrtus kaweaensis N.Snow from Papua New Guinea.Taxonomic boundaries in the context of morphological and molecular variation are discussed for Rhodomyrtus montana Guymer and R. misimana N.Snow from New Guinea.