Schizostachyum aciculare

Thai names: ไผ่หลอด (phai lot) (Trat); มณเฑียรม่วง (mon thian muang) (Peninsular); ไม้ปล้องยาว (mai plong yao) (Chanthaburi); ไผ่กะแสน (phai kasaen). — T. Smitinand, 2001 [#1003].

Malay name: Buloh padi.

Distribution: THAILAND (South); (East): Trat: Khao Saming and Bo Rai districts; (North-East): Mukdahan, Nakhon Ratchasima; in evergreen forest, at 20–500 m altitude. — MALAYSIA (Peninsular, Borneo): Negri Sembilan; Johor; Kelantan; in the understorey of evergreen forest, rare. — LAOS. — VIETNAM.

Culm size: Height 6–7 (10) m, diameter 1.5 cm.

Descriptions:

(1) "Culms small; culm-sheaths 12 cm. long, with a few pale appressed hairs; blade 8.0 x 0.7 cm., reflexed; auricles 5 mm. wide by 1.5 mm. tall, with curved bristles 3 mm. long; ligule with a fringe of short hairs, 1.5 mm. tall; leaf-blades up to 22 x 5 cm., a little hairy near the base, stalk up to 8 mm. long; auricles spreading bristly; ligule short, bristly when young. …" — H. B. Gilliland & al., Revised Flora of Malaya, vol. 3, 1971: p. 40 [#1039].

(2) "Culm sheaths pale to yellowish green, covered with short white appressed hairs; blade lanceolate, spreading to reflexed; auricles lobes 0.5–2 mm high, with bristles 4–6 mm long; ligule 1–2 mm long, rim-like, the edge densely pale-ciliate. Culms to 5–6 m long, to 4 m tall, commonly 0.6–2 cm diameter; internodes 40–60(–80) cm long, dark green. Branch complement typically a cluster of slender subequal branches, none dominant, these rebranching further. Leaf: blades 7–21 cm long, 1.3–3.5 cm wide, glabrous below; stalk 3–6 mm long; auricles small lobes about 0.5 mm high, bearing bristles 1–2 mm long; ligule an inconspicuous rim, not bristly … [flowers described]." — K. M. Wong, Bamboos of Peninsular Malaysia, 1995: p. 165-166, fig. 93 [#1210].

(3) J. S. Gamble, Bambuseae Brit. India, 1896: p. 117 [#1230].

(4) Kew GrassBase [#1335].

Images: Line drawing in J. S. Gamble, Bambuseae Brit. India, 1896: pl. 104 [#1230].

Flowering and seeding: Flowering in Thailand recorded by Mu Chakkrapong on Facebook, 29 Oct. 2017.