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Issue: Vol. 480 No. 3: 22 January 2021
Type: Article
Published: 2021-01-22
DOI: 10.11646/phytotaxa.480.3.1
Page range: 210–222
Abstract views: 22
PDF downloaded: 1

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

1. University of Chinese Academy of Sciences, Beijing 100049, China. 2. Center of Plant Ecology, Core Botanical Gardens, Chinese Academy of Sciences, Xishuangbanna, Yunnan 666303, China.
1. CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Xishuangbanna, Yunnan 666303, China. 2. Center of Plant Ecology, Core Botanical Gardens, Chinese Academy of Sciences, Xishuangbanna, Yunnan 666303, China.
1. CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Xishuangbanna, Yunnan 666303, China. 2. Center of Plant Ecology, Core Botanical Gardens, Chinese Academy of Sciences, Xishuangbanna, Yunnan 666303, China.
1. CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Xishuangbanna, Yunnan 666303, China. 2. Center of Plant Ecology, Core Botanical Gardens, Chinese Academy of Sciences, Xishuangbanna, Yunnan 666303, China.
Plastid markers Flora of Yunnan Molecular phylogeny Rorippa benghalensis Rorippa indica Eudicots

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.