[Botany • 2022] Impatiens chenmoui (Balsaminaceae) • A New Species from southern Yunnan, China

Impatiens chenmoui   Zheng W. Wang, Xiao C. Li & Q.Wang ter, 

in Wang, Wang, Xu, Zhang & Li. 2022. 

陈谋凤仙花  ||  DOI:  10.3897/phytokeys.214.94898

Abstract

Impatiens chenmoui (Balsaminaceae), a new species from southern Yunnan, China, was described and illustrated based on morphological and molecular evidence. This new species is morphologically most similar to Impatiens oblongata Ruchis. & Niet, but can be distinguished by 7–9 pairs of leaf veins, glabrous perianth, obovate upper petal, and capsule with trichome.

Keywords: China, Impatiens chenmoui, morphology, phylogeny, sect. Uniflorae

Impatiens chenmoui sp. nov.
A habit B, C flower with long spur D, E flower with spur nearly absent F leaf base G capsule H dorsal petal I spur J lateral sepals K united lateral petals L ovary surrounded by stamens.

Impatiens chenmoui sp. nov.
A habit B, C united lateral petals D ovary surrounded by stamens E flower front view F, G lateral sepals H spur I dorsal petal J–L leaves M seed N capsule O, P long-spurred flower side view Q non-spurred flower side view.

   

 Impatiens chenmoui Zheng W. Wang, Xiao C. Li & Q.Wang ter, sp. nov.

 

Diagnosis: Impatiens chenmoui is most similar to I. oblongata Ruchis. & Niet, but is distinguished by the glabrous dorsal petal, pedicel, and bracts, longer pedicel and spur, and fewer lateral sepals

Distribution and ecology: This new species was found under evergreen broad-leaved forest at an elevation of 1500–1700 m on the limestone mountain ridge, and was currently known as only one population in Mengla County, Yunnan, China. This distribution area is very close to the border with Myanmar and Laos. We assume that this species should be also distributed in Myanmar and Laos due to their similar habitat.

Etymology: The specific epithet “Chenmoui” was dedicated to the famous Chinese collector and botanist, Chen Mou (陈谋) (1903–1935) who was one of the founders of the first botanical garden cataloged by the Classification System of Plants in China, and died during the collection trip through southern Yunnan, China. The Chinese name was given as “陈谋凤仙花”.

Zheng-wei Wang, Qi Wang, Ru-hua Xu, Yu Zhang and Xiao-chen Li. 2022. Impatiens chenmoui (Balsaminaceae), A New Species from southern Yunnan, China. PhytoKeys. 214: 83-95. DOI:  10.3897/phytokeys.214.94898