GrassBase - The Online World Grass Flora


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

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

Schizostachyum silicatum

HABIT Perennial; caespitose; clumped densely. Rhizomes short; pachymorph. Culms leaning; pendulous at the tip; 700–1200 cm long; 10–30 mm diam.; woody. Culm-internodes terete; hollow; 65–75 cm long; distally pilose. Culm-nodes flush with internodes. Lateral branches dendroid; arising from mid culm. Branch complement several; in a clump; with subequal branches. Culm-sheaths persistent; 12.3–21 cm long; pilose; with white hairs, or tawny hairs; hairy on margins; truncate at apex; without auricles; setose on shoulders. Culm-sheath ligule 1 mm high; dentate. Culm-sheath blade linear, or triangular; narrower than sheath; deciduous; reflexed; 6.5–15 cm long; 4–13 mm wide; pubescent. Leaf-sheaths pubescent; outer margin hairy. Leaf-sheath oral hairs ciliate; 6 mm long. Leaf-sheath auricles falcate; 1–2 mm long. Ligule an eciliate membrane; 1 mm long. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 18–28 cm long; 22–40 mm wide. Leaf-blade surface pubescent; hairy abaxially. Leaf-blade apex acuminate.

INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in untidy tufts; pubescent on internodes; 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; 12–20 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; 12 mm long; chartaceous; without keel. Lemma surface glabrous. Lemma apex acuminate. Palea 14 mm long; chartaceous. Palea apex dentate; 2 -fid. Rhachilla extension 5 mm long; sparsely hairy. Apical sterile florets 1 in number; rudimentary.

FLOWER Lodicules absent. Anthers 6; 6–6.5 mm long; yellow, or green; anther tip apiculate. Stigmas 3. Ovary with a steeple-like appendage; glabrous.

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.