taxonID	type	description	language	source
309E7C6FC7555525A896C31DA8ACA26B.taxon	description	Figs 4, 5	en	Xu, Yi-Da, Yuan, Ming-Deng, Wang, Rui-Jiang (2025): Two new species of Hedyotis L. (Rubiaceae) from Yunnan and Guangxi, China. PhytoKeys 263: 135-149, DOI: 10.3897/phytokeys.263.163043
309E7C6FC7555525A896C31DA8ACA26B.taxon	diagnosis	Diagnosis. Hedyotis austroguangxiensis is similar to H. taishanensis G. T. Wang (Wang et al. 2018) and H. shenzhenensis Tao Chen (2007) in having shortened internodes at the base and terminal, compound-cymose inflorescences. But it can be differed from H. taishanensis by its terete stem and inflorescence rachis, obovate to ovate or oblong leaves, 3 – 6 secondary veins on each side, and longer corolla tubes; it differs from H. shenzhenensis by its terete stems and inflorescence axes, smaller leaves, and longer corolla tubes (Table 3).	en	Xu, Yi-Da, Yuan, Ming-Deng, Wang, Rui-Jiang (2025): Two new species of Hedyotis L. (Rubiaceae) from Yunnan and Guangxi, China. PhytoKeys 263: 135-149, DOI: 10.3897/phytokeys.263.163043
309E7C6FC7555525A896C31DA8ACA26B.taxon	description	Description. Perennial herbs, erect, 20 – 50 cm tall. Stem terete, glabrous, internodes 0.5 – 5.0 cm long at the base and 5.0 – 13.0 cm long toward top. Leaves opposite, sessile, blade 2.5 – 15.0 × 1.5 – 7.0 cm, ovate to oblong, apex acuminate or obtuse, base broadly cuneate to rounded, blade coriaceous, dark green adaxially and grayish green abaxially, glabrous on both sides; midrib concave adaxially and prominent abaxially; secondary veins 4 – 6 on each side, inconspicuous on both sides. Stipules interpetiolar, 1.5 – 2.5 mm long, broadly ovate or triangular, apex acuminate, margin toothed with tipped colleters, glabrous or sometimes fimbriate. Inflorescences terminal, compound-cymose; rachis terete; peduncles 6.0 – 15.0 cm long; bracts ovate-lanceolate to lanceolate, 0.5 – 3.0 cm long; bracteoles lanceolate, 1.0 – 1.5 mm long. Flowers heterostylous, subsessile, pedicels 0 – 0.5 mm long. Hypanthium ca. 1.0 mm long, obconic-campanulate, glabrous; sepals 4, ca. 1 mm long, triangular, glabrous. Corolla white or purplish on the margin of corolla lobes, infundibuliform, tube 4.2 – 5.2 mm long, glabrous abaxially, densely pubescent at throat; lobes 4, ca. 3.0 mm long, ovate. Stigma bilobed, ca. 1.0 mm, clavate. Ovary 2 - celled, ovules numerous on axile placentas. Stamens 4, anthers oblong, ca. 1.0 mm long, oblong-lanceolate. Long-styled flower: stamens included, adnate to the middle part of corolla tube; filaments ca. 1.0 mm long; styles exserted, ca. 6.0 mm long. Short-styled flower: stamens exserted, adnate to throat of corolla tube; filaments ca. 2.0 mm long; styles included, ca. 3.0 mm long. Fruits capsular, ca. 2.0 mm in diameter, subglobose or oblate globose, dehiscent at apex and then septicidally along the ventral suture. Seeds 0.5 – 0.7 mm long, numerous, angular, testa black, reticulate.	en	Xu, Yi-Da, Yuan, Ming-Deng, Wang, Rui-Jiang (2025): Two new species of Hedyotis L. (Rubiaceae) from Yunnan and Guangxi, China. PhytoKeys 263: 135-149, DOI: 10.3897/phytokeys.263.163043
309E7C6FC7555525A896C31DA8ACA26B.taxon	etymology	Etymology. The specific epithet refers to the fact that the species is growing in the south of the Guangxi Zhuang Autonomous Region. Its Chinese name is “ 桂南耳草 ” (Guì Nán Ěr Cǎo).	en	Xu, Yi-Da, Yuan, Ming-Deng, Wang, Rui-Jiang (2025): Two new species of Hedyotis L. (Rubiaceae) from Yunnan and Guangxi, China. PhytoKeys 263: 135-149, DOI: 10.3897/phytokeys.263.163043
309E7C6FC7555525A896C31DA8ACA26B.taxon	distribution	Distribution and habitat. Up to now, Hedyotis austroguangxiensis is known from Chongzuo City and Fangchenggang City of the Guangxi Zhuang Autonomous Region; it grows mainly on roadsides or wet rocks under secondary forests at an elevation of 800 – 1100 m. Main associated species are Selaginella doederleinii Hieron. (Selaginellaceae) and Blechnopsis orientalis (L.) C. Presl (Blechnaceae).	en	Xu, Yi-Da, Yuan, Ming-Deng, Wang, Rui-Jiang (2025): Two new species of Hedyotis L. (Rubiaceae) from Yunnan and Guangxi, China. PhytoKeys 263: 135-149, DOI: 10.3897/phytokeys.263.163043
5616C4CDFAFD5A2A956B2163E809C8AD.taxon	description	Figs 2, 3	en	Xu, Yi-Da, Yuan, Ming-Deng, Wang, Rui-Jiang (2025): Two new species of Hedyotis L. (Rubiaceae) from Yunnan and Guangxi, China. PhytoKeys 263: 135-149, DOI: 10.3897/phytokeys.263.163043
5616C4CDFAFD5A2A956B2163E809C8AD.taxon	diagnosis	Diagnosis. The new species is similar to H. communis W. C. Ko (1974: 578) and H. interrupta G. B. Jiang & R. J. Wang (2021) in having lanceolate to narrowly lanceolate leaves and triangular stipules, but it differs from H. communis by having obvious tetragonal stem, smaller leaves, stipules marginally with 3 – 6 colleter-tipped linear lobes on each side, and short inflorescences with small flowers (Table 2). It is also distinguished from H. interrupta by having small leaves, stipules marginally with 3 – 6 colleter-tipped linear lobes on each side, and short inflorescences (Table 2).	en	Xu, Yi-Da, Yuan, Ming-Deng, Wang, Rui-Jiang (2025): Two new species of Hedyotis L. (Rubiaceae) from Yunnan and Guangxi, China. PhytoKeys 263: 135-149, DOI: 10.3897/phytokeys.263.163043
5616C4CDFAFD5A2A956B2163E809C8AD.taxon	description	Description. Perennial herbs, erect, 15 – 60 (– 80) cm tall. Stem tetragonal, narrowly winged, branched mostly at the upper part, glabrous. Leaves opposite, petioles 2.0 – 5.0 mm long, glabrous; blade 2.5 – 9.0 × 0.7 – 2.0 cm, lanceolate to narrowly lanceolate, apex acuminate to caudate acuminate, base cuneate, blade papyraceous, light green adaxially and grayish green abaxially, glabrous on both sides; midrib depressed adaxially and prominent abaxially, secondary veins 3 – 7 on each side, distinct on both sides. Stipules interpetiolar, 5.0 – 10 mm long, triangular to narrowly triangular, marginally with 3 – 6 colleter-tipped linear lobes on each side, glabrous. Inflorescences terminal and axillary on lateral branches, 5 – 20 flowered, cyme or compound cymose; peduncles 0.5 – 3.0 cm long, tetragonal, narrowly winged, glabrous; bracts 2.0 – 12.0 mm long, lanceolate or linear. Flowers heterostylous, pedicels 0 – 2.0 mm long. Hypanthium ca. 1.0 mm long, campanulate, glabrous; sepals 4, 1.0 – 1.2 mm long, narrowly triangular, glabrous. Corolla tubular, white; tube 1.7 – 2.0 mm long, densely pubescent at throat adaxially, glabrous abaxially; lobes 4, 1.8 – 2.0 mm long, oblong-lanceolate, glabrous abaxially, and pubescence adaxially. Stigma bilobed, ca. 0.5 mm long, clavate. Ovary 2 - celled, ovules numerous on axile placentas. Stamens 4, anthers ca. 0.8 mm long, oblong-linear. Long-styled flowers: corolla tube ca. 2.0 mm long; stamens included, adnate to the middle of corolla tube; filaments ca. 0.8 mm long; styles ca. 3.3 mm long, stigma exserted. Short-styled flowers: corolla tube ca. 1.7 mm long; stamens included, adnate to throat of corolla tube; filaments ca. 1.2 mm long, anthers exserted; styles ca. 2.8 mm long, stigma included or slightly exserted. Fruits capsular, 1.5 – 2.0 × 2.0 – 2.5 mm, subglobose, sepals persistent, glabrous, dehiscent at apex and then septicidally along the ventral suture. Seeds ca. 0.5 mm long, numerous, angular, 0.4 – 0.6 mm long, testa black, reticulated.	en	Xu, Yi-Da, Yuan, Ming-Deng, Wang, Rui-Jiang (2025): Two new species of Hedyotis L. (Rubiaceae) from Yunnan and Guangxi, China. PhytoKeys 263: 135-149, DOI: 10.3897/phytokeys.263.163043
5616C4CDFAFD5A2A956B2163E809C8AD.taxon	etymology	Etymology. The specific epithet refers to the type locality of this new species, Jinghong City, Dai Autonomous Prefecture of Xishuangbanna, Yunnan Province. Its Chinese name is “ 景洪耳草 ” (Jǐng Hóng Ěr Cǎo).	en	Xu, Yi-Da, Yuan, Ming-Deng, Wang, Rui-Jiang (2025): Two new species of Hedyotis L. (Rubiaceae) from Yunnan and Guangxi, China. PhytoKeys 263: 135-149, DOI: 10.3897/phytokeys.263.163043
5616C4CDFAFD5A2A956B2163E809C8AD.taxon	distribution	Distribution and habitat. Currently, Hedyotis jinghongensis is only known from southern Yunnan Province, China. It grows on roadsides under secondary forests at an elevation of 700 – 1400 m. The main associated species are Selaginella leptophylla Baker (Selaginellaceae), Phyllanthus urinaria Linnaeus (Phyllanthaceae), and Sonerila cantonensis Stapf (Melastomataceae).	en	Xu, Yi-Da, Yuan, Ming-Deng, Wang, Rui-Jiang (2025): Two new species of Hedyotis L. (Rubiaceae) from Yunnan and Guangxi, China. PhytoKeys 263: 135-149, DOI: 10.3897/phytokeys.263.163043
