Impatiensjenjittikuliae (Balsaminaceae), a new species from Thailand.

Saroj Ruchisansakun,Piyakaset Suksathan

doi:10.3897/phytokeys.124.33607

Abstract

Impatiensjenjittikuliae Ruchis. & Suksathan, a new species from a limestone area in Thasongyang District, Tak Province, Northern Thailand, is described and illustrated. This endemic new species is distinguished from the most similar, I.lacei Hook.f. through having pilose lateral sepals vs glabrous, and by the absence of long hairs along the lamina margin. Its pollen and seed morphology, stem anatomy, and pollination ecology are also observed. Furthermore, its conservation status as Critically Endangered is also assessed.

Highlights

Balsaminaceae consists of Hydrocera Blume ex Wight & Arnott (1834: 140) with only a single species, H. triflora (L.) Wight & Arnott (1834: 140), and Impatiens L. (1753: 937), comprising over 1,000 species (Ruchisansakun et al 2018)
Micrographs were taken with a Field Emission Scanning Electron Microscope (FE-SEM) (Hitachi SU8010)
Endangered B1ab (i, ii, iii) + 2ab (i, ii, iii). This species is only known from the type locality; the extent of occurrence is estimated to be less than 5 km, where it occurs as a small population (IUCN 2012)

Summary

Introduction

Balsaminaceae consists of Hydrocera Blume ex Wight & Arnott (1834: 140) with only a single species, H. triflora (L.) Wight & Arnott (1834: 140), and Impatiens L. (1753: 937), comprising over 1,000 species (Ruchisansakun et al 2018). (1753: 937), comprising over 1,000 species (Ruchisansakun et al 2018). In Southeast Asia, many new Impatiens species were recently described (Souvannakhoummane and Suksathan 2015; Ruchisansakun et al 2017; Ruchisansakun et al 2018; Suksathan and Triboun 2009). Triboun 2009; Ruchisansakun et al 2014). It turned out to be a species new to science.

Material and methods

Result

Discussion