taxonID	type	description	language	source
E5F2056E878653C2B0FF827FC2E0471B.taxon	description	Fig. 4 Local names. Sang Rong, Ping Er. Chinese name. “ 西藏空竹 ” (xī zàng kōng zhú).	en	Chen, Yu-Jin, Chen, Mei, Zhou, Meng-Yuan, Xu, Zu-Chang, Zhang, Yu-Xiao, Liu, Jing-Xia, Li, De-Zhu (2025): Further investigation of Melocalamus (Poaceae, Bambusoideae) in China based on Skmer analysis and morphology. PhytoKeys 259: 177-198, DOI: 10.3897/phytokeys.259.151683
E5F2056E878653C2B0FF827FC2E0471B.taxon	description	Description. Perennial. Rhizomes pachymorph, short-necked. Culms apically scrambling, ca. 17 m long, 1.4 – 3 cm in diam.; internodes terete, glabrous, 40 – 90 (– 120) cm long, wall 0.2 – 0.4 cm thick; nodes flat, glabrous; white powdery below the nodes; sheath scars prominent. Primary branch buds solitary, ovate-elliptical, compressed. Branches many, subequal or occasionally with a dominant branch replacing main culm. Culm leaves tardily deciduous, 24 – 38 cm × 8 – 12 cm, 2 / 5 to 1 / 2 as long as the internodes; sheaths leathery, long-triangle, with appressed light-yellow spiny hairs abaxially, margins glabrous, apex U-shaped and projecting upward sides, papery, with fimbriate grey-white long oral setae; auricles absent; ligules truncate, short, ca. 1 mm in length, margin extremely shortly ciliolate or subglabrous; blades linear-lanceolate, erect or reflexed, 5 – 30 cm × 1 – 1.9 cm. Foliage leaves 6 – 9 per ultimate branch; sheaths 8 – 16 cm long, abaxially glabrous, apex with fimbriate grey-white long oral setae, 4 – 11 mm long; margins with fringed cilia, 6 – 15 mm long; auricles absent; inner ligules truncate, dark-purple, ca. 1 mm in length; outer ligules present, truncated; blades oblong-lanceolate, 17 – 28 cm × 3 – 9 cm, with white pubescence abaxially, margins coarse, secondary veins 5 – 12 paired. Inflorescence and caryopsis unknown.	en	Chen, Yu-Jin, Chen, Mei, Zhou, Meng-Yuan, Xu, Zu-Chang, Zhang, Yu-Xiao, Liu, Jing-Xia, Li, De-Zhu (2025): Further investigation of Melocalamus (Poaceae, Bambusoideae) in China based on Skmer analysis and morphology. PhytoKeys 259: 177-198, DOI: 10.3897/phytokeys.259.151683
E83F5234C6855CE8834E47009D821531.taxon	description	Fig. 7 Chinese name. “ 广西梨籐竹 ” (ɡuǎnɡ xī lí téng zhú).	en	Chen, Yu-Jin, Chen, Mei, Zhou, Meng-Yuan, Xu, Zu-Chang, Zhang, Yu-Xiao, Liu, Jing-Xia, Li, De-Zhu (2025): Further investigation of Melocalamus (Poaceae, Bambusoideae) in China based on Skmer analysis and morphology. PhytoKeys 259: 177-198, DOI: 10.3897/phytokeys.259.151683
E83F5234C6855CE8834E47009D821531.taxon	diagnosis	Diagnosis. Melocalamus guangxiensis resembles M. puberulus, M. cordatus, M. pacoensis, M. truongsonensis and M. compactiflorus var. fimbriatus in the characters of foliage leaf auricles with radiate oral setae or culm leaf ligules with fringed long setae at the apex. However, M. guangxiensis can be easily distinguished by its unique culm sheaths, which feature a membranous projection on the basal outer margin, ca. 1 – 2 cm and culm leaf blades that are long- lanceolate, non-constricted at the base.	en	Chen, Yu-Jin, Chen, Mei, Zhou, Meng-Yuan, Xu, Zu-Chang, Zhang, Yu-Xiao, Liu, Jing-Xia, Li, De-Zhu (2025): Further investigation of Melocalamus (Poaceae, Bambusoideae) in China based on Skmer analysis and morphology. PhytoKeys 259: 177-198, DOI: 10.3897/phytokeys.259.151683
E83F5234C6855CE8834E47009D821531.taxon	description	Description. Perennial. Rhizomes pachymorph, short-necked. Culms slender, ca. 10 – 15 m long, 1 – 2 cm in diam.; internodes greyish-green, with densely white-brown pubescence, hollow, 50 – 80 cm long, wall 3 – 5 mm; nodes prominent, a ring of light-brown tomenta present above and below nodes; sheath scars prominent, corky, with residual base of culm leaf sheaths. Buds solitary, triangle, puberulent, the lateral edges ciliolate. Branches several, slender and equal length, dominant one equal to culm in size. Culm leaves tardily deciduous, ca. 2 / 5 to 1 / 2 as long as the internodes, 20 – 30 cm long, base 15 – 20 cm wide; sheaths leathery, long-triangle, apex concave or truncated, margins thin, membranous, with white powder and brown hairs abaxially, base of outer one with a subcircular projection, ca. 1 – 2 cm; auricles wavy, narrow rim, with several fimbriate long oral setae, easily dropped; ligules prominent, 2 – 3 mm in length, uniformly serrated, with fimbriate hairs, 7 – 14 mm long; blades length 6 – 8 cm × width 0.7 – 0.9 cm, lanceolate, erect or recurved. Foliage leaves 6 – 12 per ultimate branch; sheaths leathery, glabrous; auricles reflexed, sickle-shaped, oral setae radiated, 6 – 12 mm long; ligules ca. 3 mm in length, with white short hairs abaxially, apex truncate or with inconspicuous serrated, with fimbriate long hairs, ca. 1 cm long; blades lanceolate, 16 – 26 cm × 3 – 4.5 cm, with white pubescence abaxially, one margin entire, the other with short cilium, secondary veins 10 – 12 paired. Inflorescence and caryopsis unknown.	en	Chen, Yu-Jin, Chen, Mei, Zhou, Meng-Yuan, Xu, Zu-Chang, Zhang, Yu-Xiao, Liu, Jing-Xia, Li, De-Zhu (2025): Further investigation of Melocalamus (Poaceae, Bambusoideae) in China based on Skmer analysis and morphology. PhytoKeys 259: 177-198, DOI: 10.3897/phytokeys.259.151683
E83F5234C6855CE8834E47009D821531.taxon	distribution	Distribution and ecology. This new species is found in Pingxiang and Congzuo Counties in Guangxi, China. It grows in warm and humid environments and usually occurs in limestone montane areas at altitudes of 100 – 300 m.	en	Chen, Yu-Jin, Chen, Mei, Zhou, Meng-Yuan, Xu, Zu-Chang, Zhang, Yu-Xiao, Liu, Jing-Xia, Li, De-Zhu (2025): Further investigation of Melocalamus (Poaceae, Bambusoideae) in China based on Skmer analysis and morphology. PhytoKeys 259: 177-198, DOI: 10.3897/phytokeys.259.151683
E83F5234C6855CE8834E47009D821531.taxon	etymology	Etymology. The epithet originates from Guangxi Autonomous Region where the new species was collected.	en	Chen, Yu-Jin, Chen, Mei, Zhou, Meng-Yuan, Xu, Zu-Chang, Zhang, Yu-Xiao, Liu, Jing-Xia, Li, De-Zhu (2025): Further investigation of Melocalamus (Poaceae, Bambusoideae) in China based on Skmer analysis and morphology. PhytoKeys 259: 177-198, DOI: 10.3897/phytokeys.259.151683
8FE7C3C5412157B38BE4BBE766C3E81B.taxon	description	Fig. 6 Chinese name. “ 无耳梨籐竹 ” (wú ěr lí téng zhú).	en	Chen, Yu-Jin, Chen, Mei, Zhou, Meng-Yuan, Xu, Zu-Chang, Zhang, Yu-Xiao, Liu, Jing-Xia, Li, De-Zhu (2025): Further investigation of Melocalamus (Poaceae, Bambusoideae) in China based on Skmer analysis and morphology. PhytoKeys 259: 177-198, DOI: 10.3897/phytokeys.259.151683
8FE7C3C5412157B38BE4BBE766C3E81B.taxon	description	Description. Perennial. Rhizomes pachymorph, short-necked. Culms slender, 10 – 20 m long, 2 – 5 cm in diam., wall ca. 0.5 cm thick; internodes initially with white pubescence, 30 – 60 cm long; nodes prominent; sheath scars with a ring of white-yellow tomenta above and below. Branches several to many, with one dominant branch sometimes replacing main culm. Culm leaves shorter than internode; sheaths leathery, with white spiny hairs and powder abaxially, apex slightly concave; auricles narrow, extending upwards or absent; oral setae absent; ligules 1 – 2 mm in length, denticulate; blades lanceolate, round / cordate at the base, recurved. Foliage leaves 7 – 15 per ultimate branch; sheaths glabrous, tender sheaths are covered with easily deciduous short pubescence and white powder; auricles narrow or absent; ligules entire, ca. 1 mm in length; blades length 13 – 21 cm × width 3 – 4.5 cm, with white pubescence abaxially; margins coarse. Flowering branches lateral or terminal; internodes 1 – 15 cm long, with white pubescence. Pseudospikelets lanceolate, top and edge purple, bottom yellow-green, 1 – 1.2 cm long, several to many clustered on nodes, glomerate, mixed with some small sterile and hay bracts; 3 florets in each psedospikelet with the top one sterile, fertile ones sessile. Glumes 2 – 3, ovate, 2 – 5 mm long, 2 – 3 mm wide, margins smooth. Fertile lemma lanceolate, thick membranous, glabrous, yellow, with top and edge purple, ca. 6 – 12 mm long. Palea nearly equal as lemma in size, lanceolate, membranous, navicular, 2 keels, margins with white cilia, yellow, with top and edge purple. Lodicules 3, 2 equal-sized, ca. length 2.7 mm × width 1.3 mm, one smaller, ca. length 2 mm × width 1 mm, bottom transparent with top light-purple, margins with long cilia. Stamen 6, distinct, anthers purple-red, sometimes yellow, 5 – 6 mm long, filament white. Ovary ovate-lanceolate, yellow-green; style 1, stigmas 3, plumose, white. Caryopsis unknown.	en	Chen, Yu-Jin, Chen, Mei, Zhou, Meng-Yuan, Xu, Zu-Chang, Zhang, Yu-Xiao, Liu, Jing-Xia, Li, De-Zhu (2025): Further investigation of Melocalamus (Poaceae, Bambusoideae) in China based on Skmer analysis and morphology. PhytoKeys 259: 177-198, DOI: 10.3897/phytokeys.259.151683
