Australian Systematic Botany Australian Systematic Botany Society
Taxonomy, biogeography and evolution of plants

The first phenetic analysis of species limits in Bertya (Euphorbiaceae)

M. Fatemi A B C , C. L. Gross B and J. J. Bruhl A

A Botany, University of New England, Armidale, NSW 2351, Australia.

B Ecosystem Management, University of New England, Armidale, NSW 2351, Australia.

C Corresponding author. Email:

Australian Systematic Botany 20(5) 448-463
Submitted: 2 May 2007  Accepted: 27 August 2007   Published: 8 November 2007


Morphological and phytogeographical data support the recognition of 41 taxa in Bertya, a genus endemic to Australia with many rare and threatened species. We used 107 morphological characters (69 qualitative, 38 quantitative), including novel characters of leaf basal glands and indumenta, and 166 operational taxonomic units. In three iterations by using cluster analyses and semi-strong hybrid multidimensional scaling ordination, operational taxonomic units were resolved into 41 species (6 new; 5 with very localised distributions). Fifteen (including 3 new) have or merit status as rare, endangered or threatened.


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