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156:; Peter H Weston (March 2012). "Time-calibrated phylogeny of the woody Australian genus Hakea (Proteaceae) supports multiple origins of insect-pollination among bird-pollinated ancestors".
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In his retirement he is presently involved in outstanding research work, finalising revisions and publications. Dr. Barker is a life member and is the current
President of the
207:(2005). "Patterns of evolution in Australian Mimulus and related genera (Phrymaceae~Scrophulariaceae): a molecular phylogeny using chloroplast and nuclear sequence data".
249:(17 December 1997). "Taxonomic studies in Euphrasia (Scrophulariaceae). VIII. E. ruptura, a name for a species apparently extinct in northeastern New South Wales".
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