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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.

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﻿   Ixeridium   sagittarioides    (  Asteraceae  -  Cichorieae  ) revisited: range extension and molecular evidence for its systematic position in the    Lactuca    alliance

﻿ Ixeridium sagittarioides ( Asteraceae - Cichorieae ) revisited: range extension and molecular evidence for its systematic position in the Lactuca alliance

Ixeridium sagittarioides ( Asteraceae - Cichorieae ) revisited: range extension and molecular evidence for its systematic position in the Lactuca alliance