Anemonastrum tenuicaule and A. antucense (Ranunculaceae), new combinations for a New Zealand endemic species and its South American relative

By

Mosyakin, Sergei
De Lange, Peter J. (Peter James)

Type

Article

Date of Publication

2018

Original Publication

PhytoKeys

Volume

99

Pages

107-124

Subjects

Anemonastrum , Anemone , Anemoneae , Biogeography , new combinations , New Zealand , Ranunculaceae , South America , typification

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.99.26489

 

Abstract

A rational taxonomic circumscription of genera in tribe Anemoneae (Ranunculaceae) is briefly discussed. It is concluded that, in view of the morphological diversity of the group and recent molecular phylogenetic findings, a moderately narrow approach to the re-circumscription of genera earlier included in Anemone sensu lato is preferable, in particular, with the recognition of the lineage with the base chromosome number x = 7 (Anemonesubgen.Anemonidium) as two genera, Hepatica sensu stricto and Anemonastrum in an expanded circumscription (including Anemonidium, Arsenjevia, Jurtsevia, and Tamuria). Following these conclusions, new nomenclatural combinations are proposed for two related species endemic to New Zealand and South America, respectively: Anemonastrumtenuicaule (= Anemonetenuicaulis, Ranunculustenuicaulis) and Anemonastrumantucense (= Anemoneantucensis). Information on typification is updated: the lectotype of Anemoneantucensis is the specimen from P and not a specimen from G, and the lectotype of Ranunculustenuicaulis is a specimen from AK. Biogeographic scenarios already proposed to explain the relationship of these two species and some other South America – New Zealand distribution patterns are discussed. It is concluded that the long-distance dispersal scenario fits best the available data for Anemonastrum. Two host-specific and geographically restricted species of Urosystis parasitizing A.tenuicaule and A.antucense are briefly discussed.