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Issue: Vol. 645 No. 2: 23 Apr. 2024
Type: Article
Published: 2024-04-23
DOI: 10.11646/phytotaxa.645.2.5
Page range: 163-171
Abstract views: 53
PDF downloaded: 1

Ixeridium malingheense (Asteraceae), a new species from southwestern Guizhou, China

College of Forestry, Guizhou University, 550025 Guiyang, Guizhou, China
College of Forestry, Guizhou University, 550025 Guiyang, Guizhou, China
College of Forestry, Guizhou University, 550025 Guiyang, Guizhou, China
College of Life Science, Guizhou University, 550025 Guiyang, Guizhou, China
College of Life Science, Guizhou University, 550025 Guiyang, Guizhou, China
College of Forestry, Guizhou University, 550025 Guiyang, Guizhou, China
Eudicots Ixeridium morphology phylogeny taxonomy

Abstract

A new Asteraceae species, Ixeridium malingheense Z.Li & Q.Xu sp. nov., from Xingyi City, south-western Guizhou, China, is described and illustrated based on morphological and molecular analyses. Compared with the other species of the genus, the species is most similar to I. yunnanense in a small stature, linear-lanceolate stem leaves, and short phyllaries. However, it is easily distinguished from the latter by its smaller basal leaves 18–34 × 5–13 mm (vs. 10–25 × 5 mm), spatulate or long-spatulate (vs. elliptic, lanceolate, or oblanceolate), petioles ca. 30–55 mm (vs. 10 mm to absent), outer phyllaries 1-seriate (vs. 2-seriate, unequal), achenes smaller 2.0–3.0 × 0.5–1.0 mm (vs. 3.2 × 0.6 mm), and a flowering period of March to May (vs. June). Molecular phylogenetic analyses based on nuclear ITS sequence data determined the systematic position of I. malingheense in Ixeridium.

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