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基于形态学和分子证据描述了菊科千里光族(Asteraceae, Senecioneae)中来自中国西藏东南部的一个新物种。

 (Asteraceae, Senecioneae), a new species from south-eastern Xizang, China, based on morphological and molecular evidence.

作者信息

Peng Guo-Xing, Zhao Liao-Cheng, Tang Ming, Deng Jun, Zhan Hao-Ming, Zhang Zhuo-Ni, Wang Qiang

机构信息

College of Forestry, Jiangxi Agricultural University, Nanchang 330045, Jiangxi, China.

Laboratory of Systematic Evolution and Biogeography of Woody Plants, College of Ecology and Nature Conservation, Beijing Forestry University, Beijing, 10083, China.

出版信息

PhytoKeys. 2025 Jul 1;259:161-175. doi: 10.3897/phytokeys.259.156141. eCollection 2025.

Abstract

, a new species belonging to Senecioneae (Asteraceae), is described and illustrated herein after being discovered during biodiversity surveys in Lhozhag County, Xizang Autonomous Region, China. This species is similar to (Wall. ex DC.) C.Jeffrey & Y.L.Chen, but differs mainly in having the ray floret absent (vs. 1), the leaf margins irregularly coarsely serrate (vs. finely mucronulate-serrate) and the phyllaries five (vs. three or four). It is also allied to C.Jeffrey & Y.L.Chen in growth habit, leaf blade morphology and inflorescence structure, but is distinguished by the corymbs loose and spreading (vs. dense and glomeruliform), the ligulate floret absent (vs. one or two) and the disc florets five (vs. three or four). Phylogenetic analysis, based on ITS sequences, confirms its distinct taxonomic status within . A line drawing and colour plates, a geographic distribution map, a detailed comparison table including the aforementioned three species and the provisional IUCN status are provided.

摘要

在中国西藏自治区隆子县进行生物多样性调查时发现了一个属于千里光族(菊科)的新物种,本文对其进行了描述并配有插图。该物种与(Wall. ex DC.)C.Jeffrey & Y.L.Chen相似,但主要区别在于无舌状花(相比之下有1朵)、叶缘不规则粗锯齿状(相比之下为具微凸细锯齿状)以及总苞片5枚(相比之下为3或4枚)。它在生长习性、叶片形态和花序结构方面也与C.Jeffrey & Y.L.Chen有联系,但区别在于伞房状花序疏松开展(相比之下密集呈球形)、无舌状花(相比之下有1或2朵)以及盘花5朵(相比之下为3或4朵)。基于ITS序列的系统发育分析证实了其在中的独特分类地位。提供了线条图和彩色图版、地理分布图、包括上述三个物种的详细比较表以及临时的IUCN保护等级。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9813/12238969/5f24476a78ea/phytokeys-259-161_article-156141__-g001.jpg

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