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Descriptions

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

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

Schizostachyum bamban

HABIT Perennial; caespitose; clumped densely. Rhizomes short; pachymorph. Culms leaning; pendulous at the tip; 800–1000 cm long; 20–80 mm diam.; woody. Culm-internodes terete; hollow; 40–80 cm long. Culm-nodes pubescent. Lateral branches dendroid; arising from mid culm. Branch complement several; in a clump; with subequal branches. Culm-sheaths deciduous; 13–16 cm long; 2 times as long as wide; pubescent; with white hairs; concave at apex, or truncate at apex; without auricles; setose on shoulders; shoulders with 8–10 mm long hairs. Culm-sheath ligule 1 mm high; dentate and ciliate. Culm-sheath blade lanceolate; as wide as sheath at base; erect; 12–26 cm long; 15–25 mm wide; pubescent; attenuate. Leaf-sheath oral hairs ciliate; 3–6 mm long. Leaf-sheath auricles absent. Ligule a ciliate membrane; 1 mm long. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 14.5–30 cm long; 30–50 mm wide. Leaf-blade surface glabrous. 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.

Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 7–10 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes two; persistent; shorter than spikelet. Lower glume ovate. Lower glume apex acuminate. Upper glume ovate; chartaceous. Upper glume apex acuminate.

FLORETS Fertile lemma ovate; 10–11 mm long; chartaceous; without keel. Lemma surface glabrous. Lemma apex acuminate. Palea 8–12 mm long; chartaceous; without keels. Palea apex dentate; 2 -fid. Rhachilla extension 3 mm long. Apical sterile florets 1 in number; rudimentary.

FLOWER Lodicules absent. Anthers 6; 4 mm long; yellow; anther tip apiculate. Stigmas 3. Ovary with a steeple-like appendage; pubescent all over.

FRUIT Caryopsis with free brittle pericarp.

DISTRIBUTION Asia-tropical: Malesia.

NOTES Bambuseae. Widjaja 2002.

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