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Descriptions

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

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

Bambusa affinis

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 500–600 cm long; 25–35 mm diam.; woody; without nodal roots. Culm-internodes terete; 30–60 cm long; light green, or light green and white; concolorous, or striped; striate; distally pubescent. Culm-nodes pubescent. Lateral branches dendroid. Culm-sheaths 10–15 cm long; 1 times as long as wide; yellow; glabrous, or pubescent; hairy throughout; with tawny hairs; convex at apex; without auricles. Culm-sheath blade lanceolate; reflexed; 2.5–5 cm long; 7–12 mm wide; pubescent. Leaves cauline. Leaf-sheaths striately veined; pubescent; hairs tawny. Leaf-sheath oral hairs lacking. Leaf-sheath auricles absent. Ligule an eciliate membrane. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole 0.5 cm long. Leaf-blades lanceolate; 15–25 cm long; 25–35 mm wide; glandular. Leaf-blade midrib conspicuous. Leaf-blade venation with 12–16 secondary veins. Leaf-blade surface scabrous; rough abaxially; glabrous. Leaf-blade margins scabrous. Leaf-blade apex acuminate; antrorsely scabrous.

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

FERTILE SPIKELETS Spikelets comprising 6–10 fertile florets; with diminished florets at the apex. Spikelets lanceolate; subterete; 25 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; pilose; hairy at tip.

GLUMES Glumes several; 2 empty glumes; persistent; shorter than spikelet.

FLORETS Fertile lemma ovate; 6–7 mm long; without keel; 20 -veined. Lemma apex acuminate. Palea 17 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; membranous; veined; ciliate. Anthers 6. Stigmas 3. Ovary umbonate; with a few apical hairs.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Bambuseae. Gamble 1995.

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