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Descriptions

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

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

Cephalostachyum latifolium

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms leaning, or scandent; 200–300 cm long; woody. Culm-internodes terete; hollow; dark green. Lateral branches dendroid. Culm-sheaths 15–22 cm long; 3 times as long as wide; chartaceous; concave at apex; auriculate; with acute auricles. Culm-sheath blade lanceolate; 10–12.5 cm long; 8–12 mm wide. Leaf-sheaths striately veined; outer margin hairy. Ligule an eciliate membrane; 3–6 mm long. Leaf-blade base asymmetrical; with a brief petiole-like connection to sheath; petiole 0.7–1 cm long. Leaf-blades lanceolate, or ovate; 25–40 cm long; 25–100 mm wide. Leaf-blade midrib conspicuous. Leaf-blade venation with 16–36 secondary veins; without cross veins. Leaf-blade apex acuminate; filiform; antrorsely scabrous.

INFLORESCENCE Synflorescence bractiferous; globose; 5 cm long; dense; with spathaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 12–20 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes several; persistent; shorter than spikelet. Upper glume lanceolate, or ovate; 7 mm long; chartaceous; 1-keeled. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 7 mm long.

FLORETS Fertile lemma lanceolate; 12 mm long; chartaceous; without keel. Lemma lateral veins with cross-veins. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 2–3 mm long overall. Palea tightly convolute around flower; chartaceous. Palea keels approximate.

FLOWER Lodicules 3; veined; ciliate. Anthers 6; anther tip apiculate. Filaments free. Stigmas 2. Ovary with a steeple-like appendage; glabrous.

FRUIT Caryopsis with free brittle pericarp; ovoid; 7.5 mm long; dark brown.

DISTRIBUTION Asia-temperate: China. Asia-tropical: India and Indo-China.

NOTES Bambuseae. Gamble 1996.

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