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Issue: Vol. 640 No. 3: 12 Mar. 2024
Type: Article
Published: 2024-03-12
DOI: 10.11646/phytotaxa.640.3.6
Page range: 284-292
Abstract views: 34
PDF downloaded: 2

Triplostegia alpina (Caprifoliaceae): a new species from Southwest China

School of Life Sciences, Nanchang University, Nanchang 330031, Jiangxi, China.
School of Life Sciences, Nanchang University, Nanchang 330031, Jiangxi, China.
CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, China.
School of Life Sciences, Nanchang University, Nanchang 330031, Jiangxi, China.
School of Life Sciences, Nanchang University, Nanchang 330031, Jiangxi, China.
School of Life Sciences, Nanchang University, Nanchang 330031, Jiangxi, China.
Caprifoliaceae China new species taxonomy Triplostegia Eudicots

Abstract

The species delimitation of Triplostegia has been controversy and traditionally includes two species: T. glandulifera and T. grandiflora. These two taxa differs in some morphological characters on leaves, size of corollas, and achene involucel apex. A recent study proposed to merge these two species into a single taxon, T. glandulifera, while the phylogenetic and morphological evidence suggests that this genus consists of three distinct species, including an undescribed species that is distributed in the Hengduan Mountains Region and east Himalaya. Following the phylogenetic and morphological thesis, the authors describe and illustrate this new species: Triplostegia alpina. This taxon is characterized by a brown main taproot with fine roots and one to three more slender white glabrous lateral taproots, petiolate and serrated leaves, corollas 1.1–2.2 mm, achene involucel apex in purple and slightly hooked, which are distinctive from its two congeners. The study highlight the diagnostic role of taproot, leaf, corolla, and achene involucel in delimiting Triplostegia species.

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