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Article
Published: 2016-11-02

A new species of the Ranunculaceae from southwestern China based on morphological and molecular data

Institute of Botany, the Chinese Academy of Sciences
Department of Resources and Environment, Chengdu University of Information Technology
Institute of Botany, the Chinese Academy of Sciences
Institute of Botany, the Chinese Academy of Sciences
State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, the Chinese Academy of Sciences
Administration of Xiaozhaizigou National Nature Reserve
Administration of Xiaozhaizigou National Nature Reserve
Caltha dysosmoides conservation molecular systematics new species Ranunculaceae taxonomy Eudicots

Abstract

Based on field investigations, morphological and molecular systematic studies, a new species, Caltha dysosmoides (Ranunculaceae) from southwestern China is described. It differs from all other known congeneric species by the densely dentate leaf margin, the pendulous pedicels, the scarlet flowers, the compressed filaments, and the triangular connective. To better understand taxonomy of this new species, phylogenetic analyses were conducted using a combined dataset from nrITS, plastid trnL-trnF region, and atpB-rbcL spacer. The results indicate that Caltha is monophyletic and C. dysosmoides is sister to C. sinogracilis. The conservation status of the new species is categorized as CR based on IUCN criteria.