Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae)

By

Wagner, Warren Lambert
Clark, John R. (John Robert)
Lorence, David

Type

Article

Date of Publication

2014

Original Publication

Journal of Hymenoptera research

Volume

38

Pages

37-67

Subjects

Asteraceae , Bidens , Conservation , Coreopsideae , French Polynesia , Marquesas Islands

Contributed by

Pensoft Publishers

Language

English

Published by

Washington, D.C International Society of Hymenopterists

Identifiers

DOI: https://doi.org/10.3897/phytokeys.38.7609

 

Abstract

During the preparation of the Vascular Flora of the Marquesas Islands four new species of Bidens (Coreopsideae, Asteraceae) have come to light and are described herein: B. woodii W.L. Wagner, J.R. Clark & Lorence, sp. nov. from Ua Pou, and Bidens microcephala W.L. Wagner, J.R. Clark & Lorence sp. nov., B. evapelliana W.L. Wagner, J.R. Clark & Lorence, sp. nov., and B. wichmanii W.L. Wagner, J.R. Clark & Lorence, sp. nov. from the undercollected island of Fatu Hiva. In addition to these new species, we recognize the following six species of Bidens previously described from the Marquesas Islands: Bidens beckiana (F. Br.) Sherff (Eiao and Hatutaa), B. bipontina Sherff and B. cordifolia Sch. Bip. (both in Nuku Hiva), B. henryi Sherff (Hiva Oa, Tahuata), B. uapensis (F. Br.) Sherff (Ua Pou), and B. polycephala Sch. Bip. (Nuku Hiva, Ua Huku, Hiva Oa, Tahuata, and Mohotani). Two names are reduced to synonymy under B. polycephala: B. collina Degener & Sherff, syn. nov. and B. jardinii Sch. Bip., syn. nov. Bidens polycephala has the widest distribution of the Marquesan species on five of the islands and exhibits considerable variation.