Dinochloa petasiensis

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms 20 mm diam.; woody. Culm-internodes terete; 20–30 cm long; mid-green and white; distally pruinose. Lateral branches dendroid. Branch complement several. Culm-sheaths deciduous; 7–8.5 cm long; pilose; with white hairs, or tawny hairs; hairy on margins; auriculate; with 1 mm high auricles; glabrous on shoulders, or ciliate on shoulders (1–2 bristles); shoulders with 4 mm long hairs. Culm-sheath ligule 1 mm high; entire, or dentate. Culm-sheath blade narrowly ovate; cordate; erect; 4–7.5 cm long; 5–12 mm wide; attenuate. Leaf-sheaths pilose; hairs tawny. Leaf-sheath oral hairs setose; curly; 10–17 mm long. Leaf-sheath auricles erect. Ligule an eciliate membrane; 1–2 mm long. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 23–39 cm long; 32–53 mm wide. Leaf-blade surface glabrous.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in globose clusters; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets; leafless between branches; 30 cm long overall.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 3 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes two; persistent; shorter than spikelet. Lower glume ovate; 1–1.5 mm long. Lower glume apex acute; mucronate. Upper glume ovate; 1–1.5 mm long. Upper glume apex acute; mucronate.

FLORETS Fertile lemma ovate; 2 mm long; coriaceous; without keel. Lemma surface glabrous. Lemma apex acute. Palea involute; 2 mm long; coriaceous; without keels. Palea surface glabrous, or puberulous. Palea apex acute.

FLOWER Anthers 6; 1.5 mm long; yellow.

DISTRIBUTION Asia-tropical: Malesia.

NOTES Bambuseae. Widjaja 2009.

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