Abstract
Impatiensliupanshuiensis (Balsamianceae), belonging to I.subgen.Impatiens, is recognised as a new species from Guizhou, China and it is described and illustrated. It is morphologically similar to I.xanthocephala W.W. Sm. in its yellow flowers, extremely small basal lobes on lateral united petals, broadly-dolabriform distal lobes and funnelform lower sepal. However, it is distinctive in the number of lateral sepals, teeth on the margin of lateral sepals, the recurvature of the dorsal petal, the number of lateral veins, the shape and size of the lamina and the type of lamina margin. A detailed description of the new species and colour photographs are provided. Its geographical distribution and morphology are also compared to similar species.
Highlights
The genus Impatiens Linnaeus (1753: 937–938) (Balsaminaceae) contains over 1000 species distributed primarily in the Old World tropics and subtropics (GreyWilson 1980; Yu 2012)
Impatiens liupanshuiensis is currently known only from its type locality, Zhongshan District, Guizhou, China, where it is distributed in several places with about 3000–3500 individuals known in the population
I. liupanshuiensis is nested within subgen
Summary
The genus Impatiens Linnaeus (1753: 937–938) (Balsaminaceae) contains over 1000 species distributed primarily in the Old World tropics and subtropics (GreyWilson 1980; Yu 2012). In China, 349 species of Impatiens have been recorded (Yuan et al in press), the overwhelming majority of them being distributed in the southwest region, including Yunnan, Sichuan, Tibet and Guizhou (Chen 2001; Yu 2012). Since 2021, according to our incomplete statistics, eight new species of Impatiens have been described from China (Gu et al 2021; Liao et al 2021; Peng et al 2021a, b; Song et al 2021a, b, c). In Guizhou, 61 species of Impatiens have been recorded (Peng et al 2021a; Yu et al 2021). (Poaceae) community in Xiaojiucaiping Mountain, the highest mountain of Guizhou (up to 2900 m alt.) The population of this unusual species is large. In September 2020 and August 2021, we revisited Xiaojiucaiping Mountain for a further field investigation to record morphological characters of the species. It is described here as a new species with a detailed description and illustrations
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