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Issue: Vol. 661 No. 1: 25 Jul. 2024
Type: Article
Published: 2024-07-25
DOI: 10.11646/phytotaxa.661.1.3
Page range: 47-62
Abstract views: 7
PDF downloaded: 0

A new species of Impatiens (Balsaminaceae) from Southern Xizang, China with supplementary knowledge on I. leptocarpa Hook. f.

CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China, Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China
CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China, College of Ecological Environment, Tibet University, Lhasa 850000, China, College of Life Sciences, Wuhan University, Wuhan 430072, China
CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China, Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China
Hubei Zhongsen Ecological Forestry Co., Ltd., Yichang 443000, China
CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China, Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China, Hubei Jiangxia Laboratory, Wuhan 430200, China
CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China, Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China
Eudicots Impatiens Taxonomy Phylogeny Xizang

Abstract

A new species, Impatiens lhunzeensis (Balsaminaceae), and a new record of I. leptocarpa from southern Xizang, China are reported and described in this study. Based on morphological and phylogenetic evidence, both I. lhunzeensis and I. leptocarpa are assigned to I. sect. Racemosae. The new species forms a clade with I. drepanophora, I. eubotrya and I. principis, while I. leptocarpa is phylogenetically close to I. radiata and I. harae. The new species has a sympatric distribution with and is morphologically similar to both I. radiata and I. harae, but differs by the hairy stem, the densely hairy leaf blade, the raceme inflorescence, the reniform dorsal petals, the navicular lower sepal, the broadly ovate to sub-orbicular upper petals and the triangular oblong lower petals.

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