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Descriptions

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

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

Micraira viscidula

HABIT Perennial; mat forming. Culms prostrate; 3–5 cm long; 0.5 mm diam.; rooting from lower nodes. Culm-internodes 0.1 cm long; estriate. Leaves cauline; spiral. Leaf-sheaths loose; longer than adjacent culm internode; wider than blade at the collar; pilose. Ligule a fringe of hairs. Leaf-blades deciduous at the ligule; 1 cm long; 0.5 mm wide; viscid. Leaf-blade venation with 5 subepidermal sclerenchyma strands. Leaf-blade surface pilose; hairy on both sides. Leaf-blade margins glandular. Leaf-blade apex obtuse, or abruptly acute.

INFLORESCENCE Inflorescence a panicle. Peduncle glandular.

Panicle open; ovate; 1.5 cm long. Primary panicle branches 0.3–0.5 cm long. Panicle branches glandular; viscid.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 1–3 mm long; glandular.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 1.3–1.5 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1.3–1.5 mm long; 1 length of upper glume; membranous; much thinner on margins; glandular; viscid; 1-keeled; 3 -veined. Lower glume lateral veins ribbed. Lower glume surface pubescent. Lower glume apex acuminate. Upper glume lanceolate; 1.3–1.5 mm long; 2–3 length of adjacent fertile lemma; membranous; with hyaline margins; glandular; viscid; 1-keeled; 3 -veined. Upper glume lateral veins ribbed. Upper glume surface pubescent. Upper glume apex acuminate.

FLORETS Fertile lemma oblong; 0.5 mm long; hyaline; much thinner on margins; keeled; 3 -veined. Lemma lateral veins ribbed. Lemma apex dentate; 3 -fid. Palea oblong; hyaline; 2 -veined. Palea apex divided to base; 2 -fid.

FLOWER Lodicules absent. Anthers 2; 0.5 mm long.

FRUIT Caryopsis with adherent pericarp; ellipsoid; 0.5 mm long; striate.

DISTRIBUTION Australasia: Australia.

NOTES Micraireae. Lazarides.

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