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Descriptions

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

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

Dendrocalamus hait

HABIT Perennial; caespitose; clumped densely. Rhizomes short; pachymorph. Culms erect, or leaning; pendulous at the tip; 2000 cm long; 45–55 mm diam.; woody. Culm-internodes terete; hollow; 35–44 cm long; distally pruinose, or pubescent. Lateral branches dendroid; arising from mid culm. Branch complement one; with 2 branches dominant, or 3 branches dominant. Culm-sheaths deciduous; 19 cm long; 1 times as long as wide; hispid; with white hairs; concave at apex; auriculate; with obtuse auricles; with 5 mm high auricles; setose on shoulders; shoulders with 10–15 mm long hairs. Culm-sheath ligule 10 mm high; entire. Culm-sheath blade triangular; narrower than sheath; erect, or reflexed; 2.3–5 cm long; 45–64 mm wide; glabrous on surface; acuminate. Leaf-sheath oral hairs ciliate; 6 mm long. Leaf-sheath auricles absent. Ligule an eciliate membrane; 1–2 mm long. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 9.9–20.2 cm long; 12–15 mm wide. Leaf-blade surface glabrous. 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 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 5 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes two; persistent; similar; shorter than spikelet. Lower glume ovate; 2–4 mm long. Upper glume ovate; 2–4 mm long.

FLORETS Fertile lemma ovate; 5 mm long; chartaceous; without keel. Lemma surface glabrous. Lemma apex acuminate. Palea 5 mm long; chartaceous; without keels.

FLOWER Lodicules absent. Anthers 6; 6 mm long; yellow. Filaments free. Stigmas 1; pubescent. Ovary umbonate; glabrous, or pubescent on apex.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: Malesia.

NOTES Bambuseae. Widjaja 2002.

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