Indosasa singulispicula

HABIT Perennial. Rhizomes elongated; leptomorph. Culms erect; 600 cm long; 20–30 mm diam.; woody. Culm-internodes terete; hollow; 35–40 cm long; distally pubescent. Culm-nodes swollen. Lateral branches dendroid. Branch complement three. Culm-sheaths coriaceous; pilose; with tawny hairs; glabrous on margins; auriculate; setose on shoulders. Culm-sheath ligule 1–2 mm high; ciliolate. Culm-sheath blade lanceolate; erect. Leaf-sheaths 6–7 cm long; glabrous on surface; outer margin hairy. Leaf-sheath oral hairs setose; 13 mm long. Leaf-sheath auricles falcate. Ligule an eciliate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate, or oblong; 13–27 cm long; 22–30 mm wide. Leaf-blade venation with 12–14 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 7–8 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed; 110 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes two; persistent; similar; shorter than spikelet. Lower glume lanceolate; 17–25 mm long. Lower glume lateral veins with cross-veins. Upper glume lanceolate; 17–25 mm long. Upper glume lateral veins with cross-veins.

FLORETS Fertile lemma ovate; 19 mm long; coriaceous; without keel; 15 -veined. Lemma lateral veins with cross-veins. Lemma apex acute. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3. Anthers 6. Stigmas 3. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; ellipsoid; 8 mm long; light brown.

DISTRIBUTION Asia-temperate: China.

NOTES Arundinarieae. Wen 2002.

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