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Chimonobambusa yunnanensis Hsueh & W. P. Zhang, J. Bamboo Res. 7 (1), 1988: 19.
Thai name: No known records.
Chinese name: 云南方竹 (yún nán fāng zhú).
Distribution: THAILAND: Introduced, but there is no known record of whether this species has been successfully kept in cultivation in Thailand. — CHINA (South): southwestern Sichuan, Yunnan, at 1,600–2,650 m altitude.
Descriptions (Chimonobambusa ningnanica):
(1) "Habit: Perennial. Rhizomes elongated; leptomorph. Culms erect; (600-)1000-1400 cm long; 20-30 mm diam.; woody; with root thorns from the nodes. Culm-internodes terete, or quadrangular; thin-walled; 20 cm long; papillose. Culm-nodes without obvious supra-nodal ridge; pubescent. Lateral branches dendroid. Branch complement three. Culm-sheaths deciduous; chartaceous; hispid; with tawny hairs; hairy on margins. Culm-sheath ligule 0.5 mm high; ciliate. Culm-sheath blade linear; 3-6 cm long; 3 mm wide. Leaves cauline; 3 per branch. Leaf-sheaths smooth; glabrous on surface. Leaf-sheath oral hairs ciliate; 4-5 mm long; pale. Ligule an eciliate membrane; 1 mm long. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 10-23 cm long; 15-20 mm wide. Leaf-blade venation with 8-10 secondary veins; with distinct cross veins. Inflorescences: Flowering specimens unknown." — KewScience POWO, accessed 8 July 2020 [#1305].
(2) T. H. Wen, J. Amer. Bamboo Soc. 11 (1-2), 1994: p. 37 [#1176].
(3) Flora of China [#1303].
Comments:
(1) Chimonobambusa yunnanensis is considered conspecific with Chimonobambusa ningnanica Hsueh & L. Z. Gao; cf. KewScience POWO, accessed 8 July 2020 [#1305].
(2) No record of a flowering event of this species could be found, neither under the name Chimonobambusa ningnanica nor Chimonobambusa yunnanensis (8 July 2020).
Specimen: BS-0660 [SSG] (living plants), raised from seeds. The seeds from FMXG, Yunnan, China, as "Chimonobambusa yunnanensis, 云南方竹 (yún nán fāng zhú)"; collected in early June 2011, and received on 21 June 2011 (BS-0660); collected May 2012, May 2013, and early May 2014, but were not received.
Seed viability: Rather short, 2–3 weeks under normal atmospheric conditions, or 1–2 months under very low temperatures above freezing point. Seeds need to be stored in humid conditions and should not be dried out. If affected by mold, a fungicide solution treatment prior to sowing is needed (e.g., 5 g Carbendazim in 2 l water, seeds to be soaked for 1–2 hours). — acc. FMXG.
Seed weight: 10 g ≈ 20–30 humid, de-husked seeds.
Seed germination: Over 100 de-husked seeds (BS-0660) set on different growth media, atmospheric humidity >70%, 21 June 2011. A few seeds germinated.
Comments:
(1) The seedlings were distributed in northern Thailand, but the current locations of the cultivated plants are unknown.
(2) Whether the imported seeds represent the species with the name under which they were received or another Chimonobambusa species could not be verified from the seeds and seedlings.
Chimonobambusa yunnanensis (BS-0660): Seeds, humid, bare of husks (left), germinating seed, on a mix of fine gravel, sand, coir fibre, peat and rice husks, 10th day (right)
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