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.

Micraira adamsii

HABIT Perennial; mat forming. Culms prostrate; 4–5 cm long; 0.5 mm diam.; rooting from lower nodes. Culm-internodes 0.1 cm long; estriate. Leaves cauline; spiral. Leaf-sheaths 0.4–0.5 cm long; longer than adjacent culm internode; as wide as blade at the collar; ribbed; glabrous on surface. Leaf-sheath oral hairs lacking, or bearded. Ligule a fringe of hairs; 0.3–0.5 mm long. Leaf-blades deciduous at the ligule; tapering towards tip; 0.7–1.4 cm long; 0.5–1.5 mm wide; herbaceous, or coriaceous. Leaf-blade venation comprising 5–7 vascular bundles. Leaf-blade surface scaberulous; pilose; with tubercle-based hairs (1–1.5mm long). Leaf-blade margins ciliate. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle. Peduncle 3–6 cm long; glandular; smooth; glabrous.

Panicle open; ovate; 1–1.5 cm long; 0.7–1.5 cm wide. Primary panicle branches 0.1–0.3 cm long. Panicle branches glandular; scaberulous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.5–1.3 mm long; glandular.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; 0.5–1 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 oblong, or ovate; 0.5–1 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein smooth, or scaberulous. Lower glume lateral veins absent. Lower glume apex entire, or erose; truncate, or obtuse, or acute. Upper glume oblong, or ovate; 0.5–1 mm long; 1.1–2 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein smooth, or scaberulous. Upper glume lateral veins absent. Upper glume apex entire, or erose; truncate, or obtuse, or acute.

FLORETS Fertile lemma ovate; 0.3–0.5 mm long; hyaline, or membranous; keeled; 1–5 -veined. Lemma apex emarginate, or obtuse; muticous, or mucronate. Palea oblong; 2–4 -veined. Palea apex divided to base; 2 -fid.

FLOWER Lodicules absent. Anthers 2; 0.75–1 mm long.

FRUIT Caryopsis with adherent pericarp; ellipsoid; 0.3–0.5 mm long; striate, or reticulate; obtuse.

DISTRIBUTION Australasia: Australia.

NOTES Micraireae. Lazarides.

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