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Systematic and cladistic studies of Myrtella F. Muell. and Lithomyrtus F. Muell. (Myrtaceae)

Neil Snow and Gordon P. Guymer
Austrobaileya
Vol. 5, No. 2 (1999), pp. 173-207
Published by: Queensland Herbarium
Stable URL: http://www.jstor.org/stable/41739139
Page Count: 35
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Systematic and cladistic studies of Myrtella F. Muell. and Lithomyrtus F. Muell. (Myrtaceae)
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Abstract

A systematic revision of species formerly placed in Myrtella F.Muell. (Myrtaceae) is presented. Species primarily from New Guinea remain in Myrtella sensu stricto (M. beccarii, M. bennigseniana) whereas all species from Australia are transferred to the genus Lithomyrtus F.Muell. Lithomyrtus includes seven new species viz L. densifolia N.Snow & Guymer, L. dunlopii N.Snow & Guymer, L. grandifolia N.Snow & Guymer, L. hypoleuca N.Snow & Guymer, L. kakaduensis N.Snow & Guymer, L. linariifolia N. Snow & Guymer and L. repens N.Snow & Guymer. Four new combinations viz L. cordata (A.J. Scott) N.Snow & Guymer, L. microphylla (Benth.) N.Snow & Guymer, L. obtusa (Endl.) N.Snow & Guymer and L. retusa (Endl.) N.Snow & Guymer are made for other species belonging to Lithomyrtus. Myrtella phebalioides (W. Fitzg.) A.J.Scott is reduced to synonymy under L. retusa, and M. rostrata Lauterb. is transferred to Uromyrtus as U. rostrata (Lauterb.) N.Snow & Guymer. Character data and preliminary cladistic studies strongly support the generic separation of Lithomyrtus from Myrtella, but all clades within Lithomyrtus in the strict consensus tree are highly unstable. Iterative studies with additional outgroups are needed to more confidently infer generic and specific relationships in Lithomyrtus, Myrtella and related genera.

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