Thursday, September 15, 2016

[Botany • 2016] Impatiens wawuensis • A New Species (Balsaminaceae) from Sichuan, China


Impatiens wawuensis  
 B. Ding & S. X. Yu

Abstract

We describe Impatiens wawuensis B. Ding & S. X. Yu, a new species from Mt. Wawu, Sichuan Province, China. The new species is superficially similar to I. oxyanthera in having an inflorescence consisting of two pink flowers with a reddish vein. Differences include smaller leaves and flowers, lower sepals with shorter and slightly incurved spur, lower petal of lateral united petals with an elongate linear auricle inserted into the spur, and a fusiform capsule that is sparsely verrucous. We also present for the new species its seed micromorphology and palynological features under Scanning Electron Microscopy.

Keywords: Balsaminaceae, China, Impatiens, new species, Sichuan, Eudicots

FIGURE 2. Impatiens wawuensis B. Ding & S. X. Yu.
A. Habit. B. Flower, ventral view; C. Flower, lateral view. 

Diagnosis: Similar to I. oxyanthera Hooker & Joseph Dalton (1908: 254) with the inflorescence comprising two pink flowers with a reddish vein, but differing from this species by smaller leaves and flowers, lower sepals with shorter and a slightly incurved spur, the lower petal of the lateral united petals with an elongate linear auricle inserted into the spur, and a fusiform capsule that is sparsely verrucous.

Etymology:— The species epithet wawuensis refers to the locality of the type specimen: Wawu Shan Provincial Nature Reserve, Sichuan, China.


Bo Ding, Sudhindra R. Gadagkar, Jia-Cai Wang, Mei Zhang, Hua Guo and Sheng-Xiang Yu. 2016. Impatiens wawuensis (Balsaminaceae): A New Species from Sichuan, China.
Phytotaxa. 273(4);  293–298. DOI: 10.11646/phytotaxa.273.4.5


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