Dendrocalamus sinuatus

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; woody. Culm-internodes terete; 40–50 cm long; distally pruinose. Lateral branches dendroid. Culm-sheaths deciduous; pubescent; with tawny hairs; auriculate; with 2–4 mm high auricles; setose on shoulders. Culm-sheath ligule 5 mm high; dentate. Culm-sheath blade lanceolate; acuminate. Leaf-sheath oral hairs scanty, or lacking. Ligule an eciliate membrane; erose. Leaf-blade base broadly rounded; with a brief petiole-like connection to sheath; petiole 0.5–1 cm long; petiole glabrous, or pubescent. Leaf-blades lanceolate; 20–30 cm long; 30–45 mm wide. Leaf-blade surface pubescent; hairy abaxially. Leaf-blade apex acuminate.

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

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 13 mm long; 2.5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes suppressed between florets.

GLUMES Glumes several; 3–4 empty glumes; persistent; similar; shorter than spikelet. Upper glume surface puberulous.

FLORETS Fertile lemma ovate; 11 mm long; chartaceous; without keel. Lemma surface puberulous. Lemma apex acuminate. Palea 10 mm long; chartaceous; 6–8 -veined; 2-keeled but the uppermost without keels. Palea keels ciliolate.

FLOWER Lodicules absent. Anthers 6; 5–6 mm long; anther tip apiculate. Filaments united in a tube. Stigmas 1; pubescent. Ovary umbonate; pubescent on apex.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: Indo-China and Malesia.

NOTES Bambuseae. Holttum 1995.

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