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Descriptions

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

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

Leptochloa malayana

HABIT Perennial; caespitose. Culms 20–30 cm long. Leaf-sheaths 10–12 cm long; glabrous on surface. Ligule a ciliate membrane. Leaf-blades involute; 13–25 cm long; 4–5 mm wide. Leaf-blade surface glabrous. Leaf-blade margins scabrous. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 4–12; borne along a central axis; ascending; unilateral; 3.5–10 cm long. Central inflorescence axis 7–20 cm long. Rhachis semiterete; scabrous on margins. Spikelet packing broadside to rhachis; lax; irregular.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels linear; 1–1.5 mm long.

FERTILE SPIKELETS Spikelets comprising 5–10 fertile florets; with diminished florets at the apex. Spikelets elliptic; laterally compressed; compressed slightly; 5.8 mm long; 2 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes eventually visible between lemmas. Floret callus evident; pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 2.5 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute, or acuminate. Upper glume lanceolate; 3.3 mm long; 1–1.1 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex acute.

FLORETS Fertile lemma ovate; 3.1 mm long; membranous; yellow; without keel; 3 -veined. Lemma lateral veins close to margins. Lemma apex dentate; 2 -fid; mucronate. Palea 3.6 mm long; 2 -veined. Palea keels ciliolate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; cuneate; fleshy. Anthers 3; 0.8 mm long.

FRUIT Caryopsis with adherent pericarp; ovoid; 1.2 mm long; dark brown, or red.

DISTRIBUTION Asia-tropical: Indo-China and Malesia.

NOTES Eragrostideae. Gilliland 1993.

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