Australian species of Uromyrtus are revised and separated on morphological differences under the general lineage species concept using the criterion of character fixation. Two new species are described. The first, Uromyrtus lamingtonensis, is endemic to southeastern Queensland and its mountainous southeastern boundary with New South Wales. It is distinguished from congeneric Australian species by dense oil glands on both surfaces of the relatively short, acute leaves. The second, Uromyrtus tenellus, occurs in northeastern Queensland. It differs from other Australian members of the genus by the combination of rounded leaf bases, cuspidate to apiculate leaf apices, absence of prominent oil glands on either laminar surface, and relatively long petals. Detailed descriptions, illustrations, and distribution maps are presented for the four Australian taxa. Keys are provided to separate the Australian species of Uromyrtus and to separate Uromyrtus from the New World genus Ugni, which it resembles in several aspects of floral morphology. Transfers are made from Myrtus for two New Caledonian species, Uromyrtus baumannii and Uromyrtus sunshinensis.

Communicating Editor: Matt Lavin