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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.
Deyeuxia reflexa
HABIT Perennial; caespitose; clumped loosely. Culms erect; 120 cm long; 6 -noded. Culm-internodes scaberulous. Culm-nodes glabrous. Leaves cauline. Leaf-sheaths antrorsely scabrous; glabrous on surface to pubescent. Ligule an eciliate membrane; 2–3 mm long; pubescent on abaxial surface; lacerate; obtuse. Leaf-blades flat, or involute; 15–30 cm long; 2–5 mm wide. Leaf-blade surface ribbed; scabrous; rough on both sides. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence a panicle.
Panicle open; lanceolate; effuse; equilateral, or nodding; 20 cm long. Primary panicle branches 4–7 -nate. Panicle axis with lower internodes 3 cm long. Panicle branches capillary; scabrous.
Spikelets solitary. Fertile spikelets pedicelled. Pedicels clavate; 0.5–3 mm long; scabrous.
FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.2–0.8 mm long.
GLUMES Glumes persistent; similar; shorter than spikelet; firmer than fertile lemma; gaping. Lower glume lanceolate; 0.66 length of upper glume; membranous; much thinner on margins; mid-green, or purple; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 0.9 length of adjacent fertile lemma; membranous; with scarious margins; mid-green, or purple; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex acute.
FLORETS Fertile lemma lanceolate; 3 mm long; membranous; without keel; 5 -veined. Lemma lateral veins obscure. Lemma surface scaberulous. Lemma apex entire, or dentate; 2 -fid; acute; awned; 1 -awned. Principal lemma awn subapical; curved; 2–2.5 mm long overall. Palea keels scaberulous; adorned above. Palea surface scaberulous. Palea apex undifferentiated, or ciliate. Rhachilla extension 1.5 mm long; pilose; with 1–1.2 mm long hairs.
FLOWER Lodicules 2. Anthers 3; 1.4–1.8 mm long. Stigmas 2.
FRUIT Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.
DISTRIBUTION Australasia: Australia.
NOTES Aveneae. Vickery 1994.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
