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.

Eragrostis lacunaria

HABIT Annual, or perennial; short-lived. Culms 22–37 cm long; wiry; 3–5 -noded. Lateral branches lacking. Leaf-sheaths smooth, or papillose; outer margin glabrous, or hairy. Leaf-sheath oral hairs lacking, or ciliate. Ligule a fringe of hairs. Leaf-blades involute; 2–7 cm long; 1–2 mm wide; stiff.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong, or ovate; 11–16 cm long; 6–10 cm wide; 0.5 of culm length. Primary panicle branches spreading; 1 -nate; branching divaricately; 3–6 cm long. Panicle branches stiff.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1–2 mm long; smooth, or scaberulous.

FERTILE SPIKELETS Spikelets comprising 11–33 fertile florets; with diminished florets at the apex. Spikelets linear; laterally compressed, or subterete; compressed slightly; 6–18 mm long; 0.75–1 mm wide; breaking up at maturity; rhachilla persistent; retaining paleas. Rhachilla internodes 0.5 mm long.

GLUMES Glumes deciduous; similar; shorter than spikelet. Lower glume lanceolate; 0.5 mm long; 0.5–0.66 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 0.75–1 mm long; 0.5–0.66 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; 1.5 mm long; membranous; keeled; 3 -veined. Lemma lateral veins obscure; close to margins. Lemma apex obtuse. Palea keels scaberulous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; cuneate; fleshy.

FRUIT Caryopsis with adherent pericarp; laterally compressed; sulcate on hilar side; 0.5 mm long.

DISTRIBUTION Australasia: Australia.

NOTES Eragrostideae. Gr C Austral 1994.

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