taxonID	type	description	language	source
B8AEC5ADD2F35BAF8229F2F027C66E5F.taxon	description	Figs 1, 2	en	Ni, Jing-Bo, Li, Meng-Ling, Dong, Shu-Peng, Tong, Yi-Hua (2025): Bambusa rushunii (Poaceae, Bambusoideae, Bambuseae), a new bamboo species from Guangdong, China. PhytoKeys 253: 133-141, DOI: 10.3897/phytokeys.253.143389
B8AEC5ADD2F35BAF8229F2F027C66E5F.taxon	diagnosis	Diagnosis. Bambusa rushunii resembles B. gibba McClure and B. dissimulator McClure, but can be easily distinguished from B. gibba by having a thicker culm wall (ca. 1.5 cm vs. 3 – 5 mm), extremely shortened basal internode present (vs. absent), culm leaf sheath without (vs. with) a protuberance on higher shoulder and dark brown strigose on the central part (vs. glabrous wholly), higher culm leaf ligule (4 – 8 mm vs. 2 – 3 mm) and glabrous (vs. abaxially densely pubescent) foliage leaf and is different from B. dissimulator by the extremely shortened basal internode present (vs. absent), nearly truncate or slightly obliquely truncate (vs. asymmetrically convex) culm leaf sheath apex, culm leaf auricle contiguous (vs. not contiguous) with the blade base, culm leaf blade base not narrowed (vs. narrowed), foliage leaf ligule margin ciliate (vs. glabrous) and glabrous (vs. abaxially pubescent) foliage leaf.	en	Ni, Jing-Bo, Li, Meng-Ling, Dong, Shu-Peng, Tong, Yi-Hua (2025): Bambusa rushunii (Poaceae, Bambusoideae, Bambuseae), a new bamboo species from Guangdong, China. PhytoKeys 253: 133-141, DOI: 10.3897/phytokeys.253.143389
B8AEC5ADD2F35BAF8229F2F027C66E5F.taxon	description	Description. Arborescent bamboo. Rhizome pachymorph, short-necked. Culm 8 – 10 m tall, 5 – 7.5 cm in diameter, erect, basal part slightly zigzag, apex slightly pendulous; internode terete, 35 – 45 cm long, 2 nd and / or 3 rd and / or 4 th internodes usually extremely shortened, only ca. 1 cm long; initially white powdery, glabrous, basal internodes green with many pale yellow stripes, stripes sometimes not inconspicuous; wall ca. 1.5 cm thick; supranodal ridge inconspicuous, sheath scars raised; culm bud round, branches developing from 5 th node upwards, nearly horizontally spreading, branch complements with several branches per node, central 3 dominant, branchlets usually specialised into weak thorns. Culm leaf sheath deciduous, thickly leathery, 30 – 40 cm long, 9 – 12 cm wide at apex, 20 – 32 cm wide at base, with yellow-green stripes, stripes inconspicuous when dry, sparsely dark brown strigose on central part, longitudinal ribs conspicuous when dry, apex nearly truncate or slightly obliquely truncate, without protuberance on shoulder; auricles unequal, oblong to lanceolate, contiguous with the base of blade, slightly wrinkled, margin densely with ca. 8 mm long and curved oral setae; larger auricle 1 – 2 cm long, 4 – 6 mm wide, not slanted; smaller auricle 3 – 8 mm long, 2 – 5 mm wide; ligule 4 – 8 mm high, margin serrate, densely with 2 – 3 mm long cilia; blade erect, narrowly triangular, 10 – 13 cm long, 5 – 8 cm wide, 1 / 2 – 3 / 5 as long as culm sheath, glabrous on both sides, apex involute and acuminate, base slightly extending outwards and joined with auricles, 3 / 5 – 4 / 5 as wide as sheath apex. Foliage leaves 7 – 11 per ultimate branchlet, sheath ca. 6 cm long, glabrous; auricles elliptic, ca. 2 mm long, ca. 1 mm wide, oral setae deciduous, ca. 8 mm long; inner ligules ca. 1 mm high, entire, margin ciliate; pseudopetioles ca. 2 mm long, ca. 1 mm wide; blades linear-lanceolate, papyraceous, 15 – 20 cm long, 1.4 – 1.7 cm wide, both surfaces glabrous, apex acuminate, base subrounded to cuneate, secondary veins 6 pairs, transverse veins inconspicuous. Pseudospikelets sessile, usually several to many fasciculate at nodes of flowering branches, green when fresh, yellow when dry, linear-lanceolate, 4 – 6 cm long, 5 – 8 mm wide, basally subtended by several gemmiferous bracts; prophylls ovate, 3 – 4 mm long, 2 – keeled, apex densely ciliolate; gemmiferous bracts 1 – 3, ovate, 4 – 9 mm long, glabrous, 10 – 14 - veined, apex acuminate and muronate; florets several to many, apical 1 – 2 sterile, rachilla segments flat, ca. 4 mm long, puberulous, slightly grooved, apex enlarged, with a ring of white hairs, disarticulating below each floret; glumes 1 or 2, broadly ovate, 5 – 6 mm long, glabrous, 10 – 12 - veined, apex acute; lemma lanceolate, ca. 13 mm long, glabrous, 10 – 12 - veined, apex acute; palea lanceolate, ca. 12 mm long, slightly shorter than lemma, apex acute, abaxially 2 - keeled, keels densely ciliolate at apex, with 6 veins between keels and 4 veins on each side; lodicules 3, subequal, fleshy, white, ca. 2 mm long, margin with long cilia; stamens 6, filaments free, ca. 2 cm long, white; anthers initially green-yellow, later yellow-brown, ca. 5 mm long, apex retuse; ovary obvoid, ca. 1 mm long, apex hispidulous, style short, ca. 0.3 mm long, sparsely hispidulous at base; stigmas 3, 2 – 3 mm long, slender and plumose. Mature caryopsis fusiform, yellow, ca. 8 mm long.	en	Ni, Jing-Bo, Li, Meng-Ling, Dong, Shu-Peng, Tong, Yi-Hua (2025): Bambusa rushunii (Poaceae, Bambusoideae, Bambuseae), a new bamboo species from Guangdong, China. PhytoKeys 253: 133-141, DOI: 10.3897/phytokeys.253.143389
B8AEC5ADD2F35BAF8229F2F027C66E5F.taxon	distribution	Distribution and habitat. This new species is found in Yangjiang City, Guangdong Province, China and cultivated in South China Botanical Garden. It usually occurs near villages and streams at elevations of 20 – 120 m.	en	Ni, Jing-Bo, Li, Meng-Ling, Dong, Shu-Peng, Tong, Yi-Hua (2025): Bambusa rushunii (Poaceae, Bambusoideae, Bambuseae), a new bamboo species from Guangdong, China. PhytoKeys 253: 133-141, DOI: 10.3897/phytokeys.253.143389
B8AEC5ADD2F35BAF8229F2F027C66E5F.taxon	etymology	Etymology. The species epithet honours Mr. Ru-Shun Lin, a retired employee from South China Botanical Garden, Chinese Academy of Sciences, who has made more than 600 living collections of bamboos and contributed a lot to the development of the Bamboo Garden of South China Botanical Garden. Its Chinese name is given as 汝顺坭簕竹 (Pinyin: rǔ shùn ní lè zhú).	en	Ni, Jing-Bo, Li, Meng-Ling, Dong, Shu-Peng, Tong, Yi-Hua (2025): Bambusa rushunii (Poaceae, Bambusoideae, Bambuseae), a new bamboo species from Guangdong, China. PhytoKeys 253: 133-141, DOI: 10.3897/phytokeys.253.143389
B8AEC5ADD2F35BAF8229F2F027C66E5F.taxon	discussion	Discussion. In " Flora of China ", the genus Bambusa was further classified into four subgenera: subg. Bambusa, subg. Dendrocalamopsis L. C. Chia & H. L. Fung, subg. Leleba (Rumph. ex Nakai) Keng ex L. C. Chia & H. L. Feng and subg. Lingnania (McClure) L. C. Chia & H. L. Fung (Xia et al. 2006). Bambusa rushunii possesses typical characteristics of subg. Bambusa, such as the relatively thick culm wall, persistent culm leaf blade with a broad base that is 1 / 2 – 3 / 4 as wide as sheath apex and the branchlets usually specialised into weak thorns. Thus, it is placed into that subgenus. Amongst the species of B. subg. Bambusa, B. rushunii is most similar to B. gibba and B. dissimulator in the branchlets of lower branches which are usually specialised into weak thorns and the relatively small culm leaf auricles. The detailed morphological comparison of the three species is shown in Table 1 and the diagnosis section. The most unique morphological character of B. rushunii is the extremely shortened internodes at the culm base. As far as we know, this characteristic also occurs to another species of Bambusa subg. Dendrocalamposis, viz. B. bicicatricata (W. T. Lin) L. C. Chia & H. L. Fung. However, except this character, B. rushunii is very different from B. bicicatricata in many other characters, such as morphology of culm leaves, pseudospikelet length and number of stigmas, since they belong to different subgenera (Chia et al. 1996; Xia et al. 2006).	en	Ni, Jing-Bo, Li, Meng-Ling, Dong, Shu-Peng, Tong, Yi-Hua (2025): Bambusa rushunii (Poaceae, Bambusoideae, Bambuseae), a new bamboo species from Guangdong, China. PhytoKeys 253: 133-141, DOI: 10.3897/phytokeys.253.143389
