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Descriptions

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

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

Eragrostis jainii

HABIT Annual, or perennial; short-lived; caespitose. Culms erect, or decumbent; 20–60 cm long. Culm-internodes 2–8 cm long; distally glabrous. Culm-nodes brown. Leaves mostly basal. Leaf-sheaths 3 cm long. Leaf-sheath oral hairs ciliate. Ligule a fringe of hairs. Leaf-blade base broadly rounded. Leaf-blades flat, or involute; 2–9 cm long; 2–5 mm wide; stiff. Leaf-blade surface hirsute; hairy adaxially. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle. Peduncle 5–25 cm long; glabrous.

Panicle contracted; linear; 4–23 cm long; 1–2 cm wide. Panicle branches angular; scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels angular; 1–5 mm long; scabrous.

FERTILE SPIKELETS Spikelets comprising 6–80 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or elliptic, or ovate; laterally compressed; 5–10 mm long; 2–3.5 mm wide; breaking up at maturity; rhachilla persistent; shedding paleas. Rhachilla internodes straight, or curved.

GLUMES Glumes deciduous; similar; shorter than spikelet. Lower glume lanceolate; 1–1.5 mm long; 0.66 length of upper glume; chartaceous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 1.5–2 mm long; 0.9 length of adjacent fertile lemma; chartaceous; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate, or ovate; 1.7–2 mm long; 0.7–1 mm wide; membranous; keeled (above); 3 -veined. Lemma apex acute. Palea lanceolate, or elliptic; bowed outwards; 1.7–2 mm long. Palea keels ciliolate. Palea apex acuminate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; 0.1 mm long; truncate. Anthers 2; 0.3 mm long; purple.

FRUIT Caryopsis with adherent pericarp; obovoid; 0.4–0.5 mm long; light brown.

DISTRIBUTION Asia-tropical: India.

NOTES Eragrostideae. Vivek. 2015.

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