taxonID	type	description	language	source
C638A75AD71556E98B263875DC51DC3D.taxon	materials_examined	Type. China. Guangdong Province: Yangchun City, Bajia Town, E'huangzhang Nature Reserve, near the Wufu Waterfall, 21 ° 52 ' N, 111 ° 25 ' E, a. s. l. 720 m, 3 May 2018, Wan-Yi Zhao, Jia Liu, Qiao-Ling Ding, Fan Ye YC- 2018 - 02 (holotype: SYS!, Barcode SYS 00236851; isotype: SYS!, Barcode SYS 00236852) (Figs 1, 2).	en	Liu, Zhong-Chong, Liu, Jia, Zhao, Wan-Yi, Fan, Qiang, Ye, Hua-Gu, Wang, Lei, Liao, Wen-Bo (2022): Argostemma ehuangzhangense (Rubiaceae), a new species from Guangdong, China. PhytoKeys 214: 75-82, DOI: http://dx.doi.org/10.3897/phytokeys.214.89276, URL: http://dx.doi.org/10.3897/phytokeys.214.89276
C638A75AD71556E98B263875DC51DC3D.taxon	diagnosis	Diagnosis. Argostemma ehuangzhangense is similar to A. lamxayanum and A. laotica in its habit and pseudo-verticillate leaves, but differs in having terminal solitary 4 - merous flowers, short anthers (1.2 - 1.5 mm long) opening by longitudinal slits.	en	Liu, Zhong-Chong, Liu, Jia, Zhao, Wan-Yi, Fan, Qiang, Ye, Hua-Gu, Wang, Lei, Liao, Wen-Bo (2022): Argostemma ehuangzhangense (Rubiaceae), a new species from Guangdong, China. PhytoKeys 214: 75-82, DOI: http://dx.doi.org/10.3897/phytokeys.214.89276, URL: http://dx.doi.org/10.3897/phytokeys.214.89276
C638A75AD71556E98B263875DC51DC3D.taxon	description	Description. Terrestrial perennial herbs, 1 - 4 cm tall, attached to the substrate by tubers flattened globose, with a few roots. Stems erect, densely pubescent, with one pair of scale-like leaves at the lower middle portion. Leaves four per individual, clustered at the stem apex, verticillate, anisophyllous, petiole 0.5 - 2 long mm; blades membranous or thinly papery when dried, ovate to elliptic, 5 - 25 x 3 - 12 mm, cuneate at base, acute to obtuse at apex, margins entire; adaxial surface green, densely antrorse strigose; abaxial surface grey-white with white particles, sparsely pubescent on the midrib vein and lateral veins; lateral veins 3 - or 4 - pairs; stipules deciduous. Flowers solitary, terminal; pedicels 0.8 - 1.8 cm, with densely pubescent, trichomes multicellular. Calyx densely pubescent, trichomes multicellular, hypanthium portion obovoid; lobes 4, subtriangular, 1 - 1.3 x 1.1 - 1.4 mm, abaxially pubescent, adaxially glabrous. Corolla white, rotate, external surface sparsely pubescent, internal surface glabrous, corolla tube 0.3 - 0.6 mm long; corolla lobes 4, oblong-lanceolate, 3 - 4 x 1.5 - 2 mm. Stamens 4; filaments free, 3.5 - 4 mm, exserted; anthers 1.2 - 1.5 mm long, coherent into a tube, dehiscent longitudinally. Ovary 2 - locular, ovules numerous in each locule; style filiform, ca. 4 mm, with short pubescence, stigma capitate, exserted. Capsule obovoid, 2 - 5 mm in diameter, 1 - 3 mm long, pubescent, crowned by a persistent calyx, without ribs or furrows.	en	Liu, Zhong-Chong, Liu, Jia, Zhao, Wan-Yi, Fan, Qiang, Ye, Hua-Gu, Wang, Lei, Liao, Wen-Bo (2022): Argostemma ehuangzhangense (Rubiaceae), a new species from Guangdong, China. PhytoKeys 214: 75-82, DOI: http://dx.doi.org/10.3897/phytokeys.214.89276, URL: http://dx.doi.org/10.3897/phytokeys.214.89276
C638A75AD71556E98B263875DC51DC3D.taxon	distribution	Distribution. Argostemma ehuangzhangense is endemic to E'huangzhang Nature Reserve, southwestern Guangdong Province. It is currently known only from two populations recorded in county of Dianbai and city of Yangchun.	en	Liu, Zhong-Chong, Liu, Jia, Zhao, Wan-Yi, Fan, Qiang, Ye, Hua-Gu, Wang, Lei, Liao, Wen-Bo (2022): Argostemma ehuangzhangense (Rubiaceae), a new species from Guangdong, China. PhytoKeys 214: 75-82, DOI: http://dx.doi.org/10.3897/phytokeys.214.89276, URL: http://dx.doi.org/10.3897/phytokeys.214.89276
C638A75AD71556E98B263875DC51DC3D.taxon	etymology	Etymology. The specific epithet ' ehuangzhangense' is derived from the type locality, E'huangzhang Nature Reserve of the Guangdong Province, in China. This area is the oldest geological platform in the Guangdong Province, in which many endemic species occur (Wang et al. 2003; 2004; Ding et al. 2018). The new species is also expected to occur in the Yunkaishan National Nature Reserve, Maoming City, because this area shares a similar tectonic history with E'huangzhang. Therefore, we proposed for the vernacular name of the species as yuexīxuehua (粤西雪花).	en	Liu, Zhong-Chong, Liu, Jia, Zhao, Wan-Yi, Fan, Qiang, Ye, Hua-Gu, Wang, Lei, Liao, Wen-Bo (2022): Argostemma ehuangzhangense (Rubiaceae), a new species from Guangdong, China. PhytoKeys 214: 75-82, DOI: http://dx.doi.org/10.3897/phytokeys.214.89276, URL: http://dx.doi.org/10.3897/phytokeys.214.89276
