Two new Marquesan species of the southeastern Polynesian genus Oparanthus (Asteraceae, Coreopsidinae)

By

Wagner, Warren Lambert
Lorence, David

Type

Article

Date of Publication

2011

Original Publication

International Journal of Myriapodology

Volume

4

Pages

139-148

Subjects

Asteraceae , Conservation , French Polynesia , Marquesas Islands , Oparanthus

Contributed by

Pensoft Publishers

Language

English

Published by

Leiden Brill [2008]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.4.1603

 

Abstract

Two new species of the recently revised genus Oparanthus (Asteraceae, Subtribe Coreopsidinae) were discovered during the National Tropical Botanical Garden/Smithsonian Institution 1997 expedition to the Marquesas Islands. Oparanthus woodii W. L. Wagner & Lorence, sp. nov. is known from a single population on the island of Nuku Hiva, and O. tiva W. L. Wagner & Lorence, sp. nov. is known only from Tahuata. Small domatia with a tuft of hairs occur in O. tiva (and the previously known O. hivoanus), and similar but naked domatia are found occasionally in O. woodii. Domatia are of exceedingly rare occurrence in Asteraceae. Both new species are extremely rare and are considered critically endangered (CR) as are the other four species of the genus.