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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 dissimulator

HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; erect at the tip; 1000–1500 cm long; 50–75 mm diam.; woody; with root thorns from the nodes. Culm-internodes terete; hollow; distally glabrous, or pubescent. Lateral branches dendroid. Buds or branches present on lower quarter of culm. Branch complement three. Culm-sheaths deciduous; coriaceous; green; pubescent; auriculate; with unequal auricles; setose on shoulders; shoulders with 10 mm long hairs. Culm-sheath ligule 5–7 mm high; fimbriate. Culm-sheath blade ovate; cordate; deciduous; hispid and with ciliate margins; acuminate. Leaves cauline; 5–14 per branch. Leaf-sheaths smooth, or scaberulous; glabrous on surface, or puberulous. Leaf-sheath oral hairs ciliate. Leaf-sheath auricles falcate. Ligule an eciliate membrane. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath; petiole glabrous, or pubescent. Leaf-blades lanceolate; 7–17 cm long; 10–15 mm wide. Leaf-blade venation indistinct; with 6–12 secondary veins; without cross veins. Leaf-blade surface puberulous; sparsely hairy. Leaf-blade apex acuminate.

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; leafless between clusters.

FERTILE SPIKELETS Spikelets comprising 4–5 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 25–30 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes definite; 2–3 mm long; pubescent; hairy at tip.

GLUMES Glumes several; comprising 2 gemmiferous bracts; 0–1 empty glumes.

FLORETS Fertile lemma lanceolate; 12 mm long; without keel. Lemma lateral veins obscure. Lemma apex obtuse, or acute. Palea 1 length of lemma. Palea keels ciliolate; adorned above. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 3; membranous; veined; ciliate. Anthers 6; anther tip smooth. Stigmas 3. Ovary umbonate; pubescent on apex.

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

NOTES Bambuseae. McClure 1996.

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