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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Gigantochloa luteostriata
HABIT Perennial; caespitose. Rhizomes short; pachymorph. Culms erect; 1000 cm long; 20–50 mm diam.; woody. Culm-internodes terete; with small lumen; 30–40 cm long; mid-green; distally glabrous, or pubescent. Lateral branches dendroid. Culm-sheaths persistent; 12–12.5 cm long; hispid; with dark brown hairs, or black hairs; auriculate; with obtuse auricles; with 2–3 mm high auricles; glabrous on shoulders. Culm-sheath ligule 2–2.5 mm high; entire. Culm-sheath blade lanceolate; narrower than sheath; deciduous; reflexed; 6.3–7 cm long; 12–15 mm wide; pubescent (sparsely). Leaf-sheath oral hairs ciliate; 1–2 mm long. Leaf-sheath auricles falcate; obtuse. Ligule an eciliate membrane; 1–2 mm long. Collar with external ligule. Leaf-blade base with a brief petiole-like connection to sheath. Leaf-blades lanceolate; 12–28 cm long; 29–48 mm wide; mid-green and yellowish green; variegated (striped). Leaf-blade surface pilose; sparsely hairy; hairy abaxially.
INFLORESCENCE Synflorescence bractiferous; clustered at the nodes; in stellate clusters; dense; with glumaceous subtending bracts; with axillary buds at base of spikelet; prophyllate below lateral spikelets; leafless between clusters.
Fertile spikelets sessile.
FERTILE SPIKELETS Spikelets comprising 2 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 9–21 mm long; breaking up at maturity; disarticulating above glumes but not between florets. Rhachilla internodes suppressed between florets.
GLUMES Glumes several; 4 empty glumes; persistent; similar; shorter than spikelet. Lower glume ovate; 7 mm long. Lower glume apex acuminate; mucronate. Upper glume ovate; 16 mm long. Upper glume margins ciliate. Upper glume apex acuminate; mucronate.
FLORETS Fertile florets increasing in size upwards. Fertile lemma ovate; 17–21 mm long; chartaceous; without keel. Lemma margins ciliate. Lemma apex acuminate. Palea 14–18 mm long; 2-keeled. Palea keels ciliolate. Palea apex dentate; 2 -fid. Apical sterile florets 1 in number; barren (without palea); lanceolate.
FLOWER Lodicules absent. Anthers 6; 9 mm long; red. Filaments united in a tube. Stigmas 1; pubescent.
FRUIT Caryopsis with adherent pericarp.
DISTRIBUTION Asia-tropical: Malesia.
NOTES Bambuseae. Widjaja 2002.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
