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.

Deyeuxia ciliata

HABIT Perennial; mat forming. Culms erect; 37–55 cm long. Culm-internodes smooth. Leaf-sheaths smooth; hispid. Ligule a ciliolate membrane; 0.8–2 mm long; obtuse. Leaf-blades convolute; 7–22 cm long; 2–3 mm wide. Leaf-blade venation with sclerenchyma strands widened to form a discontinuous subepidermal layer, or with continuous uniform subepidermal sclerenchyma layer on the underside. Leaf-blade surface scabrous; rough abaxially; pubescent; hairy adaxially. Leaf-blade apex obtuse.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear, or oblong; 2–10.5 cm long; 0.7–1.5 cm wide. Primary panicle branches 3–3.5 cm long. Panicle axis smooth, or scaberulous; hispidulous. Panicle branches hispidulous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.6–3.6 mm long; pubescent.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 3.8–4.4 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus glabrous, or sparsely hairy. Floret callus hairs 0.3 mm long; 0.05 length of lemma.

GLUMES Glumes persistent; similar; reaching apex of florets; firmer than fertile lemma. Lower glume lanceolate; 3.6–4.2 mm long; 0.9 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume surface hispidulous. Lower glume apex obtuse. Upper glume lanceolate; 3.8–4.4 mm long; membranous; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume lateral veins ribbed. Upper glume surface hispidulous. Upper glume apex obtuse.

FLORETS Fertile lemma lanceolate; 3.4–3.8 mm long; membranous; without keel; 5 -veined. Lemma surface scabrous; rough above. Lemma apex entire, or dentate; 2 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5–0.75 way up back of lemma; straight; 1.4–1.7 mm long overall; not or scarcely exserted from spikelet. Palea 2–3.4 mm long. Rhachilla extension 0.7–1.5 mm long; pilose; with 1.2–1.4 mm long hairs.

FLOWER Lodicules 2. Anthers 3; linear; 2–2.2 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform. Endosperm soft. Disseminule comprising a floret.

DISTRIBUTION South America: western South America.

NOTES Aveneae. Villav 1996.

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