By Wearn James   Gange Alan   in Oecologia

ISSN:0029-8549|153|4|959-971

Springer Publishing Company ‎(2007)‎

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By Wearn James A.   Mabberley David J.   in Systematic Botany

ISSN:1548-2324|36|4|1050-1061

American Society of Plant Taxonomists‎(2011)‎

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