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Ixeridium sagittarioides (Asteraceae-Cichorieae) revisited: range extension and molecular evidence for its systematic position in the Lactuca alliance
- Source :
- PhytoKeys, Vol 230, Iss , Pp 115-130 (2023)
- Publication Year :
- 2023
- Publisher :
- Pensoft Publishers, 2023.
-
Abstract
- Our first record of the rare and scatteredly distributed Ixeridium sagittarioides for Guizhou, China, triggered a study to assess its systematic position. The species was placed in four different genera in the course of its taxonomic history and was recently treated with doubts as a member of Ixeridium in the Flora of China. Comparative morphological investigation and phylogenetic analyses based on the nuclear ribosomal DNA internal transcribed spacer (nrITS) and five non-coding plastid DNA regions (petD region, psbA-trnH, trnL-trnF, rpl32-trnL (UAG) and 5´rps16-trnQ (UUG) spacers) provided evidence that the species is not a member of Ixeridium and the Crepidinae but has evolved by ancient hybridisation of members of the Lactuca alliance (Lactucinae). It is reinstated as Lactuca sagittarioides and a comprehensive morphological description is provided, based on material from its entire range of distribution.
Details
- Language :
- English
- ISSN :
- 13142003
- Volume :
- 230
- Issue :
- 115-130
- Database :
- Directory of Open Access Journals
- Journal :
- PhytoKeys
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.7e805f43df394a00ae219a68f618fee6
- Document Type :
- article
- Full Text :
- https://doi.org/10.3897/phytokeys.230.107733