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Issue: Vol. 638 No. 2: 29 Feb. 2024
Type: Article
Published: 2024-02-29
DOI: 10.11646/phytotaxa.638.2.6
Page range: 175-184
Abstract views: 60
PDF downloaded: 1

Allium kangdingense (Amaryllidaceae, Allioideae), a new species of section Sikkimensia from western Sichuan

Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education; College of Life Sciences; Sichuan University; 610065; Chengdu; Sichuan; People’s Republic of China
Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education; College of Life Sciences; Sichuan University; 610065; Chengdu; Sichuan; People’s Republic of China
Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education; College of Life Sciences; Sichuan University; 610065; Chengdu; Sichuan; People’s Republic of China
Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education; College of Life Sciences; Sichuan University; 610065; Chengdu; Sichuan; People’s Republic of China
Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education; College of Life Sciences; Sichuan University; 610065; Chengdu; Sichuan; People’s Republic of China
Allium sect. Sikkimensia morphological characters molecular markers phylogenetics analysis Monocots

Abstract

Allium kangdingense D.F. Xie & X.J. He. a new species from western Sichuan Province, China, is described and illustrated herein. Evidence from morphological and phylogenetic analyses suggested that this new species belongs to section Sikkimensia of subgenus Reticulatobulbosa. It is morphologically closer to A. plurifoliatum and A. zhegushanense but differentiated by its fibrous roots in fuchsia, semiterete and semi-fistulose leaves, cross-section of scape, tepal color, and the base of stamen filaments. Taxonomic delineation and phylogenetic analysis based on nuclear ribosomal internal transcribed spacers (ITS) and four cpDNA (atpI–atpH, trnV–ndhC, rpoB–trnC, trnL–trnF) regions further revealed that Allium kangdingense is related to other species of sect. Sikkimensia, such as A. beesianum, A. sikkimense, A. yuanum, and A. cyaneum. The detailed differences in morphological characters and habitat are presented.

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