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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 poilanei

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 500–600 cm long; 5–10 mm diam.; woody. Culm-internodes terete; smooth; distally glabrous. Lateral branches dendroid. Culm-sheaths glabrous; without auricles; glabrous on shoulders. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; truncate. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 6–9 cm long; 6 mm wide; glaucous. Leaf-blade venation with 6 secondary veins; without cross veins. Leaf-blade surface glabrous. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in globose clusters; 0.5–0.7 cm long; 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 fertile florets; without rhachilla extension. Spikelets ovate; laterally compressed; compressed slightly; 5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes suppressed between florets.

GLUMES Glumes one the lower absent or obscure, or two, or several; 1–3 empty glumes; persistent; similar; shorter than spikelet. Lower glume ovate; 2.5 mm long; chartaceous; without keels. Lower glume apex obtuse. Upper glume ovate; 3.5 mm long; chartaceous; without keels; 5 -veined. Upper glume apex obtuse.

FLORETS Fertile florets increasing in size upwards. Fertile lemma ovate; 4.5–5 mm long; chartaceous; without keel; 7–9 -veined. Lemma surface scaberulous; rough above; glabrous. Lemma apex obtuse; mucronate. Palea 4 mm long; chartaceous; 2-keeled but the uppermost without keels. Palea keels ciliate.

FLOWER Lodicules absent. Anthers 6; 3.5 mm long; anther tip apiculate. Filaments united in a tube. Stigmas 1. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Bambuseae. Camus 2002.

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