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SEXUAL SYSTEMS OF NEW CALEDONIAN ARALIACEAE: A PRELIMINARY PHYLOGENETIC REAPPRAISAL

Published online by Cambridge University Press:  23 October 2001

M. A. SCHLESSMAN ,
G. M. PLUNKETT ,
P. P. LOWRY II  and
D. G. LLOYD
M. A. SCHLESSMAN
Affiliation:
Department of Biology, Box 187, Vassar College, Poughkeepsie, NY 12604-0187, USA
G. M. PLUNKETT
Affiliation:
Department of Biology, Virginia Commonwealth University, PO Box 842012, Richmond, VA 23284-2012, USA
P. P. LOWRY II
Affiliation:
Laboratoire de Phanérogamie, Muséum National d'Histoire Naturelle, 16 rue Buffon, 75005 Paris, France
D. G. LLOYD
Affiliation:
Department of Plant and Microbial Sciences, University of Canterbury, Christchurch 1, New Zealand
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Extract

A preliminary analysis of New Caledonian Araliaceae has shown varying degrees of support for previous hypotheses on sexual system evolution in the family. Andromonoecy, rather than hermaphroditism, is strongly supported as the ancestral sexual system for the Araliaceae. Derivation of hermaphroditism from andromonoecy in Delarbrea harmsii R. Vig. and Polyscias bracteata (R. Vig.) Lowry, ined. is also strongly supported. Support for the derivation of dioecy from andromonoecy in several New Caledonian species of Polyscias J. R. Forst. & G. Forst. depends in part on an assumption that andromonoecy cannot be secondarily derived from dioecy. The derivation of hermaphroditism from andromonoecy in Schefflera candelabra Baill. and S. pseudocandelabra R. Vig. is equivocal. The hypothesis that the immediate ancestors of Arthrophyllum Blume were andromonoecious is not supported.

Keywords

AndromonoecyApiaceaeApialesdioecy
Type
Research Article
Information
Edinburgh Journal of Botany , Volume 58 , Issue 2 , June 2001 , pp. 221 - 228
Copyright
© 2001 Trustees of the Royal Botanic Garden, Edinburgh

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