Raphiocarpussinovietnamicus (Gesneriaceae), a new species from southern China and central Vietnam

Abstract

Raphiocarpus sinovietnamicus, a new species of Gesneriaceae from China and Vietnam, is described and illustrated here. It is morphologically close to R. axillaris and R. tamdaoensis, but can be distinguished from the later two by its broadly tubular corolla tube and red to purple-red, purplish-yellow corolla outside. Detailed morphological description together with color illustration, information on phenology, distribution, ecology and preliminarily conservation status of the new taxon was also presented.

Raphiocarpus taygiangensis (Gesneriaceae), a new species from central Vietnam

“…The genus Raphiocarpus Chun (1946) from Gesneriaceae family includes about 16 species, distributed from southwest China (Weber et al 1998, 2020 ; Li and Wang 2005 ; Wei et al 2010 ; Zhang et al 2010 ; Chen et al 2015 ; Wei 2018 ; Wei et al 2022 ) to central Vietnam (Pham 2000; Phuong 2005 ; Phuong and Xuyen 2010 ; Phuong et al 2012 ; Luu et al 2018 ; Vu 2018 ; Middleton et al 2021 ; Hassler 2022 ; Powo 2022 ; Xin et al 2022 ). There are presently ten species of Raphiocarpus found and described in Vietnam, namely R. annamensis (Pellegr.)…”

“…B.L.Burtt (Weber et al 1998), R. macrosiphon (Hance) Burtt (Weber et al 1998), R. petelotii (Pellegr.) B.L.Burtt (Weber et al 1998), R. tamdaoensis Phuong Xuyen & Y.G.Wei ( Phuong et al 2012 ) , and R. sinovietnamicus Z.B.Xin, L.X.Yuan & T.V.Do ( Xin et al 2022 ).…”

“…These plants have subshrub habit, opposite leaves spreading along stem, axillary 1–3-flowered cyme, 5-lobed calyx dissected from the base, 4 fertile stamens arranged in two pairs, and 2-lobed stigma, which allows us to identify them as a representatives of the genus Raphiocarpus. After consulting the relevant literatures ( Pellegrin 1930 ; Chun 1946 ; Wang et al 1998 ; Weber et al 1998; Ho 2000 ; Wei et al 2010 ; Zang et al 2010; Phuong et al 2012 ; Chen et al 2015 ; Luu et al 2018 ; Vu 2018 ; Wei 2018 ; Middleton et al 2021 ; Wei et al 2022 ; Xin et al 2022 ) and examining Raphiocarpus specimens housed in such herbaria as E, K, P, LE, PE, IBK, KUN, and VNMN, we assume our plants as a new species, well segregated from all known species of the genus by its morphological characters. This discovered new species is described and illustrated below.…”