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Magnolia Press, Phytotaxa, 3(480), p. 210-222, 2021

DOI: 10.11646/phytotaxa.480.3.1

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A new Rorippa species (Brassicaceae), R. hengduanshanensis, from the Hengduan Mountains in China

Journal article published in 2021 by Quan-Jing Zheng ORCID, Chih-Chieh Yu ORCID, Yao-Wu Xing ORCID, Ting-Shen Han ORCID
Distributing this paper is prohibited by the publisher
Distributing this paper is prohibited by the publisher

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Abstract

A new species of genus Rorippa, R. hengduanshanensis, from the Hengduan Mountains, is described herein. Comparing the floral structure and overall fruit morphology of R. hengduanshanensis with similar taxa (e.g., R. benghalensis, R. dubia, and R. indica) revealed a series of morphological differences, both qualitative and quantitative. R. hengduanshanensis differs from R. benghalensis in the ebracteate racemes; from R. dubia in the flattened silique, the presence of four petals and the ploidy level (2n=6x=48); and from R. indica in the uniseriate seeds. Phylogenetic analyses using three plastid markers (psbC-trnS, trnG-trnM, and trnL) further revealed clear interspecific divergences that can distinguish R. hengduanshanensis from its morphologically related taxa.