Plant Systematics and Evolution

, Volume 225, Issue 1–4, pp 185–199 | Cite as

A search for the phylogenetic position of the seven-son flower (Heptacodium, Dipsacales): Combining molecular and morphological evidence

  • N. Pyck
  • E. Smets


A first report on the problematic phylogenetic position ofHeptacodium (2 spp.; China) using molecular data from chloroplast DNA is presented. Amplification of ORF2280 homolog region was executed in a number of representative taxa in order to determine ifHeptacodium shows similar structural rearrangements as other Dipsacales. DNA sequences ofndhF were generated to clarify the phylogenetic position ofHeptacodium among Caprifoliaceae (s.l.). Six outgroup taxa and fifteen representatives of Dipsacales were sampled and more than 2100 basepairs ofndhF sequence were used in a cladistic analysis. Parsimony analysis produced two shortest trees and showedHeptacodium as sister to all members of Caprifoliaceae (s.str.), although weakly supported. Additionally, trees were constructed withndhF data supplemented with availablerbcL sequences and a morphological data set. Results of all analyses support an unresolved basal position forHeptacodium among Caprifoliaceae (s.l.), which in part explains the difficulty experienced previously in classifying the genus.

Key words

Cladistic analyses Dipsacales Heptacodium morphology ndhphylogeny rbc


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Copyright information

© Springer-Verlag 2000

Authors and Affiliations

  • N. Pyck
    • 1
  • E. Smets
    • 1
  1. 1.Laboratory of Plant Systematics, Institute of Botany and MicrobiologyKatholieke Universiteit LeuvenLeuvenBelgium

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