Gigantochloa cochinchinensis

Thai name: ไผ่ซอด (phai sot) (Nong Khai). — T. Smitinand, 2001 [#1003]; BKF [#1368].

Distribution: THAILAND (North-East). — VIETNAM (South).

Description: "… Rhizomes short; pachymorph. Culms erect; 500–600 cm long; 30–40 mm diam.; woody. Culm-internodes terete; hollow; 35 cm long. Lateral branches dendroid. Culm-sheaths 15 cm long; 1.5 times as long as wide; glabrous; truncate at apex. Culm-sheath blade lanceolate; 3.5 cm long; 10 mm wide. Leaf-sheaths glabrous on surface; outer margin hairy. Ligule an eciliate membrane; truncate. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.2–0.3 cm long. Leaf-blades lanceolate; 11–13 cm long; 15 mm wide; glaucous. Leaf-blade venation with 8–12 secondary veins; with distinct cross veins. Leaf-blade surface puberulous; hairy abaxially. Leaf-blade margins scabrous; ciliate; hairy at base. Leaf-blade apex acuminate … [flowers and seeds described]." — Kew GrassBase [#1335].