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THE GENERIC POSITION OF ANNESORHIZA FILICAULIS ECKL. & ZEYH. (APIACEAE)

Published online by Cambridge University Press:  24 October 2001

B.-E. VAN WYK  and
P. M. TILNEY
B.-E. VAN WYK
Affiliation:
Department of Botany, Rand Afrikaans University, PO Box 524, Auckland Park, 2006 Johannesburg, South Africa
P. M. TILNEY
Affiliation:
Department of Botany, Rand Afrikaans University, PO Box 524, Auckland Park, 2006 Johannesburg, South Africa
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Abstract

A study of the fruit structure of Annesorhiza filicaulis Eckl. & Zeyh. has shown that only the four commissural ribs are expanded, resulting in a fruit wing configuration characteristic of the genus Peucedanum. Hysteranthous or seasonal leaves, as present in A. filicaulis, are not unique to Annesorhiza but are also encountered in Chamarea Eckl. & Zeyh. and in Peucedanum sulcatum Sond. and related species. The correct generic delimitation of Peucedanum (one or several genera) is one of the last challenges in the alpha taxonomy of southern African Apiaceae, and A. filicaulis complicates the matter even further. Nevertheless, A. filicaulis is clearly a misfit in Annesorhiza and should be included in future studies of Peucedanum sensu lato, even though the latter may prove not to be monophyletic. Annesorhiza filicaulis is formally transferred to Peucedanum, and the correct nomenclature, typification and known geographical distribution of this poorly known species is presented.

Keywords

Annesorhizafruit structurenew combinationPeucedanum
Type
Research Article
Information
Edinburgh Journal of Botany , Volume 58 , Issue 3 , November 2001 , pp. 383 - 387
Copyright
© 2001 Trustees of the Royal Botanic Garden, Edinburgh

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