Melocalamus yunnanensis (T. H. Wen) T. P. Yi, 2007

Zhang, Yu-Xiao, Ye, Xia-Ying, Yang, Hong-Mei, Zhang, Xian-Zhi, Wang, Ping-Yuan & Li, De-Zhu, 2016, New distribution records of two bamboo species in Yunnan, China with description of the inflorescence for Melocalamus yunnanensis (Poaceae, Bambusoideae), PhytoKeys 62, pp. 41-56 : 44-46

Melocalamus yunnanensis (T. H. Wen) T. P. Yi, 2007 Fig. 3

Racemobambos yunnanensis T. H. Wen, J. Bamboo Res. 5: 11. 1986; Neomicrocalamus yunnanensis (T. H. Wen) Ohrnberger, The Bamboos of the World: Introduction to the Work, 4: 19.1997.

Melocalamus yunnanensis (T. H. Wen) T. P. Yi, J. Sichuan Forest. Sci. Tech. 28: 18. 2007.

Type.

CHINA. Yunnan: Jinping, W. W. Zhou ZP. 83311 (holotype, ZJFI).

Culms scrambling, 6-15 m, 5-10 mm in diam.; internodes 20-60 cm, smaller culms solid or nearly so, white pubescent, especially dense below corky nodes. Dominant branches equal in size to culm, other branches slender and many. Culm leaf sheaths brown scabrous, lower portion very tough, upper papery and thin, margins glabrous, shoulders protruding conspicuously; ligules inconspicuous; auricles and oral setae absent; blades lanceolate, recurved. Leaves 3-4 per ultimate branch; leaf sheaths slightly pubescent, margins ciliate; ligules 1-1.5 mm; auricles absent; oral setae erect to spreading, short; blades lanceolate, 4-7 × 0.8-1.3 cm, glabrous, veins 4 pairs, without tessellation. Flowering branches with or without leaves, internodes with dense white pubescence. Pseudospikelets 0.8-1.2 cm, several to many clustered on nodes, glomerate, 2-3 florets for each pseudospikelet with the top one sterile; rachilla ca. 1.5 mm; glumes 2, 2-4 mm; lemma purple red, 5-6 mm, glabrous; palea a little longer than lemma, purple red, 6-7 mm, 2-keeled, glabrous; lodicules 3, nearly equal, margins ciliate; stamens 6, yellow; ovary ovate-lanceolate; style 1, stigmas 2, plumose. Caryopsis unknown.

Voucher specimens.

CHINA. Yunnan: Jiangcheng, 860 m, 22°28.429'N, 101°29.938'E, 12 August 2012, Y. X. Zhang, Y. X. Xu & M. Y. Zhou 12153, 12154 (KUN); Mengla, 790 m, 21°36.55'N, 101°33.683'E, 8 April 2013, Y. X. Zhang &Y. X. Xu 13006, 13009 (KUN); Menglun, the Bamboo Garden of Xishuangbanna Tropical Botanical Garden (cultivated), 12 March 2012, P. Y. Wang C130104 (HITBC).

Figures

Figure 3. Melocalamus yunnanensis. A Habitat (12153) B Culm leaf (12153) C Flowering branches (12154) D-E Pseudospikelets (D 12154, E C 130104).