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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Lachnagrostis meionectes
HABIT Annual; caespitose; clumped densely. Basal innovations intravaginal. Culms erect; 10–30 cm long; 3 -noded. Culm-internodes terete; scaberulous. Culm-nodes glabrous. Leaf-sheaths tight; striately veined; scaberulous. Ligule an eciliate membrane; 3–5 mm long; lacerate; acute, or acuminate. Leaf-blades flat, or conduplicate; 1–7 cm long; 0.75–2.5 mm wide. Leaf-blade venation with 2–6 secondary veins. Leaf-blade surface smooth, or scaberulous. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence a panicle. Peduncle antrorsely scabrous above.
Panicle open; pyramidal; 5–10 cm long; 5–10 cm wide. Primary panicle branches spreading; 2–5 -nate; whorled at most nodes; branching divaricately. Panicle branches scabrous.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels clavate; 0.5 mm long; scabrous.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 3–3.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.
GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 3–3.5 mm long; 1 length of upper glume; membranous; much thinner on margins; 1-keeled; keeled above; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute, or acuminate. Upper glume lanceolate; 3–3.5 mm long; 1.5 length of adjacent fertile lemma; membranous; with hyaline margins; 1-keeled; keeled above; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex acute, or acuminate.
FLORETS Fertile lemma lanceolate, or oblong; 2–2.5 mm long; hyaline; without keel; 5 -veined. Lemma lateral veins obscure. Lemma surface puberulous. Lemma apex dentate; 4 -fid; truncate; awned; 1 -awned. Principal lemma awn dorsal; arising 0.7–0.8 way up back of lemma; straight, or geniculate; 2–4 mm long overall; without a column, or with a straight or slightly twisted column. Palea 0.8 length of lemma; hyaline. Rhachilla extension pilose.
FLOWER Lodicules 2; membranous. Anthers 3; 0.75 mm long.
FRUIT Caryopsis with adherent pericarp; oblong. Embryo 0.25 length of caryopsis. Hilum linear.
DISTRIBUTION Australasia: Australia.
NOTES Aveneae. Vickery 2001.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
