Indosasa sinica
Indosasa sinica C. D. Chu & C. S. Chao, Acta Phytotax. Sin. 21 (1), 1983: 65.
Thai name: No known records.
Chinese name: 中华大节竹 (zhōng huá dà jié zhú).
Distribution: THAILAND: The occurrence of the cultivation of this species in Thailand has not yet been confirmed. — CHINA (South): Guangxi, southern Guizhou, southern Yunnan, at low elevations. — LAOS.
Descriptions:
(1) "Habit: Perennial. Rhizomes elongated; leptomorph. Culms erect; 500-1000 cm long; 30-60 mm diam.; woody. Culm-internodes terete; thin-walled; 35-50 cm long; dark green, or brown; scaberulous; distally mealy and hispid. Lateral branches dendroid; spreading. Branch complement three; thinner than stem. Culm-sheaths yellow; hispid; setose on shoulders; shoulders with curved hairs; shoulders with 10-15 mm long hairs. Culm-sheath ligule 2-3 mm high; ciliate. Culm-sheath blade lanceolate; reflexed; scabrid and pubescent. Leaves 3-9 per branch. Leaf-sheath oral hairs ciliate; deciduous; 4-8 mm long; dark. Leaf-sheath auricles absent, or erect. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 12-22 cm long; 15-30 mm wide. Leaf-blade venation with 10-12 secondary veins. Leaf-blade apex acuminate. … [flowers and seeds described]." — KewScience POWO, accessed 10 July 2020 [#1305].
(2) "Culms 10–15 m, 6–10 cm in diam.; internodes flexuose, initially green, brown or dark green in age, 30–50 cm, densely glaucous, sparsely setose; wall thick; nodes very prominent. Culm sheath yellow-green, striate, with scattered clumps of setae, more densely setose at base; auricles small; oral setae curved, 1–1.5 cm; ligule arched, 2–3 mm, ciliate; blade reflexed, green, triangular-lanceolate, densely setose. Leaves 3–9 per ultimate branch; auricles developed or sometimes obscure; oral setae deciduous, purple, ca. 8 mm; blade lanceolate, 12–22 × 1.5–3 cm, apical blades to 6 cm wide, glabrous, secondary veins 5- or 6-paired. … [flowers and seeds described]." — Flora of China, accessed 10 July 2020 [#1303].
Images: Line drawing in Flora of China [#1303]. Photo in KewScience POWO (culm-leaf) [#1305]; photos as "Indosasa sinica Anji BG" in H. C. Tan, 2012: 68 [#1195].
Specimen: BS-0765-1 [BBG] (living plant), received from China as "Indosasa sinica, 中华大节竹 (zhōng huá dà jié zhú)", 25 Jan. 2013.
Comments: This bamboo has leptomorph rhizomes, prominent nodes, 3 upright branches at the mid-culm, foliage-leaf blades with cross veins, hence it could be a species of Indosasa. Whether it is Indosasa sinica or another species, could not be checked. Oral setae of culm-leaves in BS-0765-1 (a very young plant) seem to be straight, spreading, and longer than in Indosasa sinica.
Comments:
(1) Seeds offered by FMXG, Yunnan, China, as "Indosasa sinica, 中华大节竹 (zhōng huá dà jié zhú)", due for collection in July/Aug. 2012, but were not received.
(2) Seed weight: 10 g ≈ 240–260 dried spikelets (husk-wrapped seeds). Seed viability: Six months under normal atmospheric conditions; one year in storage at 1–6 °C. — acc. FMXG.
Indosasa sinica: Node with branches — by courtesy of Lihua Jiang, Yunnan Bamboo, China
Indosasa sinica: Culms — by courtesy of Lihua Jiang, Yunnan Bamboo, China