Youngia zhengyiana (Asteraceae, Crepidinae), a new species from south China, with notes on the systematics of Youngia inferred from morphology and nrITS phylogeny
Youngia zhengyiana (Asteraceae, Crepidinae), a new species from south China, with notes on the systematics of Youngia inferred from morphology and nrITS phylogeny
复制标题
Youngia zhengyiana（菊科，Crepidinae），中国南方的一新种，附有从形态学和nrITS系统发育推断的Youngia系统学注释
DOI：
10.11646/phytotaxa.170.4.3
复制
发表时间：
2014-06-04
期刊：
影响因子：
1.1
通讯作者：
Sun, Hang
中科院分区：
文献类型：
--
作者：
Deng, Tao;Zhang, Jian-Wen;Sun, Hang
本文描述了贵州黄姜属黄姜属黄姜组（Youngia sect. Mesomeris）的一新种--郑义黄姜（Youngia zhengyiana）。该物种的放置在黄蓍评估的基础上的核核糖体ITS的分子系统发育分析和形态学比较与相关物种。根据形态学特征，新种与已知的唯一一个有5朵小花的种Y.四川。根据nrITS系统发育，首次包括几个种，讨论了黄姜属的亚属分类和最近争论的界限。假黄草属被确认为黄草属的同源物。重新定义的黄蓍属仍然是非单系的，Lapsanastrum嵌套在其中。
Youngia zhengyiana, a new species of Youngia sect. Mesomeris (Asteraceae: Crepidinae) from Guizhou province of south China is described and illustrated. The placement of this species within Youngia is assessed based on a molecular phylogenetic analysis of the nuclear ribosomal ITS and on morphological comparisons with related species. The new species can be easily distinguished by morphology from the only species known to possess 5 florets, Y. szechuanica. The infrageneric classification and the recently debated circumscription of Youngia are discussed in the light of the nrITS phylogeny, which includes several species for the first time. Pseudoyoungia is confirmed as a congener of Youngia. The redefined Youngia is still non-monophyletic with Lapsanastrum nested within it.