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— BAMBOOS OF THAILAND — ONLINE VERSION OF 1 JANUARY 2021 — LATEST UPDATE OF 21 SEPTEMBER 2025 —
Chimonobambusa angustifolia C. D. Chu & C. S. Chao, J. Nanjing Technol. Coll. Forest Prod. 1981 (3), 1981: 36.
Synonyms: Chimonobambusa linearifolia W. D. Li & Q. X. Wu; Chimonobambusa recurva T. P. Yi.
Thai name: No known records.
Chinese name: 狭叶方竹 (xiá yè fāng zhú).
Distribution: CHINA (South, Central, North): Guizhou, Guangxi, Hubei, Shanxi.
Descriptions:
(1) "Habit: Perennial. Rhizomes elongated; leptomorph. Culms erect; 200 cm long; 10 mm diam.; woody; with root thorns from the nodes. Culm-internodes quadrangular; 8-15 cm long; distally glabrous. Culm-nodes purple. Lateral branches dendroid. Branch complement three; in a horizontal line. Culm-sheaths tardily deciduous; chartaceous; brown; glabrous; hairy on margins; concave at apex; without auricles; glabrous on shoulders. Culm-sheath blade inconspicuous. Leaves cauline; 1-3 per branch. Leaf-sheaths outer margin hairy. Leaf-sheath oral hairs scanty. Ligule an eciliate membrane. Collar with external ligule. Leaf-blade base cuneate; with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 8-17 cm long; 7-12 mm wide; chartaceous. Leaf-blade venation with 6-8 secondary veins; with distinct cross veins. Leaf-blade surface glabrous. Leaf-blade margins scabrous. Leaf-blade apex acuminate. Inflorescences: Flowering specimens unknown." — KewScience POWO, accessed 7 July 2020 [#1305].
(2) T. H. Wen, J. Amer. Bamboo Soc. 11 (1-2), 1994: p. 31 [#1176].
(3) Flora of China [#1303].
Comments: No record of a flowering event of this species could be found (7 July 2020).
Specimen: BS-0657 [-] (seeds), from FMXG, Yunnan, China, as "Chimonobambusa angustifolia, 狭叶方竹 (xiá yè fāng zhú)"; collected 2010, not received; collected in early May 2011, and received 30 May 2011.
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 dry 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 husk-wrapped seeds.
Seed germination: Over 100 seeds set on 10 different growth media, atmospheric humidity >70%, 2 June 2011. None of the seeds germinated.
Comments: 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.
Chimonobambusa angustifolia (BS-0657): Seeds, humid, with their husks
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