Indosasa bacquangensis

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 800–1200 cm long; 30–50 mm diam.; woody. Culm-internodes terete; hollow; 20–30 cm long. Lateral branches dendroid. Branch complement three. Leaves 3–4 per branch. Leaf-sheaths glabrous on surface; outer margin hairy. Leaf-sheath oral hairs setose. Leaf-sheath auricles falcate. Ligule an eciliate membrane; 1 mm long; truncate. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.5–0.7 cm long. Leaf-blades oblong; 20–25 cm long; 40–50 mm wide. Leaf-blade venation with 14–18 secondary veins; with distinct cross veins. Leaf-blade surface glabrous. Leaf-blade apex acuminate.

INFLORESCENCE Synflorescence bractiferous; paniculate; lax; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 14–20 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 180–220 mm long; 6–10 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 12 mm long; glabrous.

GLUMES Glumes several; 2–3 empty glumes; persistent; similar; shorter than spikelet. Lower glume lanceolate. Upper glume lanceolate; 7 mm long.

FLORETS Fertile lemma ovate; 17–22 mm long; 10–14 mm wide; coriaceous; without keel; 19–23 -veined. Lemma apex acute. Palea 15–20 mm long. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3. Anthers 6. Stigmas 3.

FRUIT Caryopsis with adherent pericarp; ellipsoid; 10 mm long; light brown.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Arundinarieae. Nguyen 2002.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.