GrassBase - The Online World Grass Flora


W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Dinochloa trichogona

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms zigzag; 20–30 mm diam.; woody. Culm-internodes terete; solid; 20–25 cm long; antrorsely scabrous; distally glabrous, or pubescent. Lateral branches dendroid. Branch complement many; with 1 branch dominant; as thick as stem. Culm-sheaths brown, or purple; pubescent; hairy at the base; with erect hairs; with dark brown hairs; hairy on margins; auriculate; with 5–15 mm high auricles; setose on shoulders; shoulders with curved hairs. Culm-sheath ligule 15 mm high; lacerate. Culm-sheath blade narrowly ovate; cordate; erect, or reflexed; 11.5 cm long; 25 mm wide; pubescent; attenuate. Leaf-sheaths outer margin hairy. Leaf-sheath oral hairs setose; curly; 10 mm long. Leaf-sheath auricles falcate; 5 mm long. Ligule an eciliate membrane; 10 mm long; lacerate. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 25–30 cm long; 70 mm wide. Leaf-blade venation with distinct cross veins. Leaf-blade surface glabrous. Leaf-blade apex acuminate.

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; 200–300 cm long overall.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 2–3 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes two; persistent; shorter than spikelet. Lower glume oblate; 1 mm long; 3 -veined. Lower glume apex truncate. Upper glume oblate; 1.5 mm long; 1–5 -veined. Upper glume apex truncate.

FLORETS Fertile lemma oblong; 2 mm long; coriaceous; without keel; 1–7 -veined. Lemma apex truncate. Palea involute; 2 mm long; coriaceous; 6 -veined; without keels.

FLOWER Lodicules absent. Anthers 6; anther tip apiculate. Stigmas 3. Ovary umbonate; glabrous.

FRUIT Caryopsis with fleshy pericarp; orbicular; isodiametric; 10 mm long; green, or black; smooth; glabrous. Endosperm evanescent.

DISTRIBUTION Asia-tropical: Malesia.

NOTES Bambuseae. Dransfield 1995.

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