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Descriptions

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

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

Racemobambos celebica

HABIT Perennial. Rhizomes elongated; pachymorph. Culms scandent; 3–6 mm diam.; woody. Culm-internodes terete; hollow; 17 cm long. Culm-nodes brown; pubescent. Lateral branches dendroid. Branch complement many; in a clump; with 1 branch dominant; as thick as stem. Culm-sheaths without auricles. Leaves cauline. Leaf-sheaths glabrous on surface to pubescent. Leaf-sheath oral hairs setose; 6 mm long. Ligule a ciliolate membrane. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 3–13 cm long; 5 mm wide. Leaf-blade surface glabrous.

INFLORESCENCE Inflorescence a panicle; comprising 3–9 fertile spikelets; bracteate at pedicel base.

Panicle open; ovate; 3 cm long; bearing few spikelets. Panicle axis pubescent.

Spikelets solitary. Fertile spikelets sessile and pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–6 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes flattened; 2 mm long; glabrous.

GLUMES Glumes persistent; dissimilar; shorter than spikelet. Lower glume ovate; 1 mm long; 0.25–0.33 length of upper glume; membranous; without keels. Lower glume surface glabrous, or puberulous. Lower glume apex acute. Upper glume ovate; 3–4 mm long; 0.6 length of adjacent fertile lemma; membranous; without keels; 7 -veined. Upper glume apex acute.

FLORETS Fertile lemma ovate; 5–7 mm long; membranous; without keel; 7–9 -veined. Lemma surface pubescent. Lemma margins pubescent. Lemma apex acuminate. Palea 6 mm long; 4 -veined. Palea surface glabrous, or puberulous; hairy on back. Apical sterile florets distinct from fertile; 1 in number; rudimentary.

FLOWER Lodicules 3; 1 mm long; ciliate. Anthers 6. Stigmas 3. Ovary umbonate; pubescent on apex.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: Malesia.

NOTES Bambuseae. Dransfield 2001.

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