A taxonomic study of the genus Hellenocarum H. Wolff (Umbelliferae-apioideae) based on morphology, fruit anatomy, and molecular data

Ekaterina A. Zakharova, Eugene V. Kljuykov, Galina V. Degtjareva, Tahir H. Samigullin, Uliana A. Ukrainskaya, Stephen R. Downie

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Abstract

Phylogenetic relationships among the species of Hellenocarum and its close allies (Umbelliferae-Apioideae) were investigated using nuclear (ITS, ETS) and plastid (psbA-trnH intergenic spacer) DNA sequences. The results obtained were supplemented with an examination of morphology from herbarium and field-collected materials, as well as details of fruit anatomy obtained from light and scanning electron microscopy. According to the molecular data, Hellenocarum is not monophyletic. In most molecular analyses, the genus comprises 2 disparate lineages, with each lineage supported by distinct morphological characters (e.g., structure of underground organs, shape of the umbel, petal color). The first lineage includes Hellenocarum multiflorum (the type species) and H. strictum and corresponds to Hellenocarum sensu stricto. The second lineage includes Hellenocarum amplifolium and H. pisidicum and is recognized herein as the new genus Neomuretia Kljuykov, Degtjareva & Zakharova. Carum depressum is united with Hellenocarum sensu stricto. Three new nomenclatural combinations are proposed: Hellenocarum depressum (Hartvig & Kit Tan) Kljuykov & Zakharova; Neomuretia amplifolia (Boiss. & Hausskn) Kljuykov, Degtjareva & Zakharova; and Neomuretia pisidica (Kit Tan) Kljuykov, Degtjareva & Zakharova.

Original languageEnglish (US)
Pages (from-to)176-193
Number of pages18
JournalTurkish Journal of Botany
Volume40
Issue number2
DOIs
StatePublished - Jan 1 2016

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Keywords

  • ETS
  • Fruit anatomy
  • Hellenocarum
  • ITS
  • Molecular phylogeny
  • Morphology
  • Neomuretia
  • PsbA-trnH
  • Taxonomy
  • Umbelliferae

ASJC Scopus subject areas

  • Plant Science

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