Affordable Access

deepdyve-link
Publisher Website

Phylogeny and biogeography of Caltha (Ranunculaceae) based on chloroplast and nuclear DNA sequences.

Authors
  • Schuettpelz, Eric1
  • Hoot, Sara B
  • 1 Department of Biological Sciences, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53201 USA.
Type
Published Article
Journal
American journal of botany
Publication Date
Feb 01, 2004
Volume
91
Issue
2
Pages
247–253
Identifiers
DOI: 10.3732/ajb.91.2.247
PMID: 21653380
Source
Medline
License
Unknown

Abstract

The genus Caltha (Ranunculaceae) consists of 10 species of low-growing, perennial herbs distributed throughout the moist temperate and cold regions of both the Northern and Southern Hemispheres. Traditionally, the species have been divided into two sections: section Psychrophila in the Southern Hemisphere with diplophyllous leaves and section Caltha in the Northern Hemisphere with leaves lacking inflexed appendages. This study uses chloroplast and nuclear DNA sequences to determine the relationships among the 10 species, test the monophyly of sections Psychrophila and Caltha, trace the evolutionary history of diplophylly, and explore biogeographical hypotheses for the genus. Analysis of these data resulted in a well-resolved and well-supported phylogeny. Section Psychrophila (C. sagittata, C. appendiculata, C. dionaeifolia, C. obtusa, C. introloba, and C. novae-zelandiae) was resolved as monophyletic, indicating a single origin of diplophylly. The species of section Caltha (C. natans, C. scaposa, C. palustris, and C. leptosepala) formed a paraphyletic grade. The resulting phylogeny strongly supports a Northern Hemisphere origin for Caltha, followed by dispersal to the Southern Hemisphere (Gondwanaland). A vicariance model is invoked to explain present-day distributions in South America, Australia, and New Zealand.

Report this publication

Statistics

Seen <100 times