Chimonobambusa sect. Oreocalamus (Keng) T. H. Wen & Ohnrberger, 1940

Zhang, Yi-Ting, Cao, An-Jiang & Ding, Yu-Long, 2024, Chimonobambusa multiramosa (Poaceae, Bambusoideae), a new bamboo species from northeast Yunnan, China, Phytotaxa 649 (1), pp. 44-50 : 45

Key to the species of Chimonobambusa sect. Oreocalamus

1a. Culms sheaths caducous or late; internodes terete or basal ones slightly 4–angled, with a ring of spines at basal nodes; shoots appearing from April to December.................................................................................................................... C. sect. Oreocalamus

1a. Culm sheaths abaxially glabrous or sometimes sparsely hispid.

2a. Young culm internodes hispid, the glabrous............................................................................................................... C. paucispinosa

2b. Young culm internodes hirsute, the tuberculate.

3a. Culm sheath blade articulate ..................................................................................................................................... C. microfloscula

3b. Culm sheath blade not articulate ............................................................................................................................ C. quadrangularis

1b. Culm sheaths abaxially densely hispid.

4a. Culm sheaths abaxially with irregular blotches................................................................................................................ C.tuberculat

4b. Culm sheaths abaxially without blotches.

5a. Culm sheaths delayed deciduous.

6a. 2–3 leaves at the apex of branchlets; foliage leaf blades 12–33 cm long...................................................................... C. metuoensis

6b. 6–8 leaves at the apex of branchlets, foliage leaf blades 30–35 cm long...................................................................... C. grandifolia

5b. Culm sheaths caducous.

7a. Branches 3 per culm node; culm sheaths usually shorter than internodes .................................................................... C. ningnanica

7b. Branches 10–18 per culm node; culm sheaths usually longer than internodes .......................................................... C. multiramosa