Two new species of Gigantochloa (Poaceae: Bambusoideae) from Yunnan, China Author Qin, Qiao-Mei 0000-0002-0567-8123 qmqin @ foxmail. com; https: // orcid. org / 0000 - 0002 - 0567 - 8123 qmqin@foxmail.com Author Tong, Yi-Hua 0000-0002-5034-005X Key Laboratory of Plant Resources Conservation and Sustainable Utilization & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China & Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China & yh-tong @ scbg. ac. cn; https: // orcid. org / 0000 - 0002 - 5034 - 005 X yh-tong@scbg.ac.cn Author Zeng, Yi 0000-0003-2431-0292 No. 2 Middle school of Zhuzhou, Zhuzhou 412007, Hunan, China & 349848599 @ qq. com; https: // orcid. org / 0000 - 0003 - 2431 - 0292 349848599@qq.com Author Cai, Zhuo-Yu 0000-0001-9288-0882 Key Laboratory of Plant Resources Conservation and Sustainable Utilization & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China & Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China & University of Chinese Academy of Sciences, Beijing 100049, China & caizhuoyu @ scbg. ac. cn; https: // orcid. org / 0000 - 0001 - 9288 - 0882 caizhuoyu@scbg.ac.cn Author Ni, Jing-Bo 0000-0002-1695-6141 Key Laboratory of Plant Resources Conservation and Sustainable Utilization & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China & No. 2 Middle school of Zhuzhou, Zhuzhou 412007, Hunan, China & zzxx 8424 b @ 126. com; https: // orcid. org / 0000 - 0002 - 1695 - 6141 Author Xia, Nian-He 0000-0001-9852-7393 Key Laboratory of Plant Resources Conservation and Sustainable Utilization & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, Guangdong, China & No. 2 Middle school of Zhuzhou, Zhuzhou 412007, Hunan, China & nhxia @ scbg. ac. cn; https: // orcid. org / 0000 - 0001 - 9852 - 7393 nhxia@scbg.ac.cn text Phytotaxa 2023 2023-09-21 616 1 79 88 http://dx.doi.org/10.11646/phytotaxa.616.1.6 journal article 10.11646/phytotaxa.616.1.6 1179-3163 8389459 Gigantochloa maneensis Q. M. Qin, N. H. Xia & J. B. Ni , sp. nov. , Figs. 1−2 Type :— CHINA . Yunnan , Mengla County , Menglun , cultivated in Xishuangbanna Tropical Botanical Garden , introduced from Man’e Village , 8 August 2017 , Qiao-Mei Qin , Juan Chen & Su Li QQM-319 ( holotype IBSC !) . Diagnosis: — Gigantochloa maneensis is similar to G. callosa , but differs in the intranodes with a ring of white hairs (vs. glabrous), infranodal regions with a ring of white (vs. brown) hairs, culm leaf sheath without stripe (vs. with yellow stripes initially) and densely black- (vs. brown- and gray-) hispid abaxially, erect (vs. reflexed) culm sheath blades, oblong (vs. rhombic) culm sheath auricles, 6–7 mm (vs. ca. 10 mm ) wide, and sparsely brown-hispid (vs. white-pubescent) foliage leaf sheaths ( Table 1 ). Description:— Rhizomes pachymorph. Culms erect, ca. 10 m tall, 5–7 cm in diam., walls ca. 2.5 cm thick, lower nodes with a few verticillate aerial roots; internodes 20–30 cm long, terete, greyish-green with yellow stripes, white-pubescent; nodes slightly prominent, intranode ca. 1 cm tall, with a ring of white hairs, infranodal region with a ring of white hairs. Branches 0.5–1.5 m long, developing from the 5 th –8 th node above the ground, numerous, dominant branches inconspicuous. Culm leaf sheath deciduous, leathery, nearly as long as internodes, densely brown-hispid abaxial surface with deciduous trichomes; blade erect, lanceolate, 1/3–1/2 as long as culm leaf sheath; auricles oblong, 6–7 mm wide and ca. 3 mm tall; ligule 2–3 mm tall, dentate. Foliage leaves 7–9 per ultimate branch; sheath sparsely brown-hispid, with deciduous trichomes; auricles absent; ligule ca. 2 mm tall; outer ligules ca. 2 mm high; petiole ca. 2 mm long; blades 13–30 cm × 1.5–3.0 cm, lanceolate, apex acuminate, glabrous, longitudinal veins 6–8 pairs. Pseudospikelets densely clustered at nodes of flowering branches, 8.5–11.0 mm long, with 3–4 glumes, 2 perfect florets and a terminal sterile floret consisting of only an empty; rachilla very short; lemma 7–8 mm long, apex mucronate, margins ciliate; palea 6.0– 7.5 mm long and ca. 1 mm wide, apex bifid, 2-keeled, keels and margins ciliate, 2 veins between keels, 1 vein on each side; stamens 6, filaments united into a tube, translucent; anthers yellow, 4–5 mm long, with an apical hairy mucro ca. 0.5 mm long; ovary subcylindrical with a slightly expanded, thickened and hairy apex, ca. 0.7 mm long; style terminating in a single hairy stigma, 7–8 mm long. Caryopsis ca. 6 mm long. Distribution and Habitat: —This species is cultivated in Man’e Village, Menglun Town, Mengla County, Yunnan Province , and then introduced to Xishuangbanna Tropical Botanical Garden. Wild population has not been found so far. Phenology: —New shoots October to November, flowering August to September. Etymology: —The specific epithet is derived from the type locality, Man’e Village. Additional specimens examined ( paratypes ): — CHINA . Yunnan : Mengla , Xishuangbanna Tropical Botanical Garden , 21°41’N , 101°26’E , elev. 570 m , 18 November , 2010 , Ping-Yuan Wang C130036 ( HITBC ) ; ibid., 12 October 2011 , Ping-Yuan Wang C130092 ( HITBC ). Chinese vernacular names:—AENJfflfi (pinyin: màn é jù zhú).