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 curtoides

HABIT Perennial; mat forming. Culms erect; 5–8 cm long. Culm-internodes smooth. Leaf-sheaths smooth. Ligule a ciliolate membrane; 2–5 mm long; acuminate. Leaf-blades aciculate; conduplicate; 1–3 cm long; 1.5 mm wide. Leaf-blade surface scabrous; rough adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; ovate; 1.5–2 cm long; 1 cm wide. Primary panicle branches 0.5–1 cm long. Panicle axis smooth. Panicle branches smooth, or scaberulous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 2–3.8 mm long; puberulous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6–6.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.8–1.2 mm long; 0.1 length of lemma.

GLUMES Glumes persistent; similar; reaching apex of florets; firmer than fertile lemma. Lower glume lanceolate; 6–6.5 mm long; 1 length of upper glume; membranous; yellow; 1-keeled; 1 -veined. Lower glume primary vein scabrous. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex acuminate. Upper glume lanceolate; 6–6.5 mm long; membranous; yellow; 1-keeled; 3 -veined. Upper glume primary vein scabrous. Upper glume lateral veins prominent. Upper glume surface asperulous. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 3.8–4.4 mm long; membranous; yellow; without keel; 5 -veined. Lemma surface scaberulous; rough above. Lemma apex dentate; 2 -fid, or 4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.25–0.33 way up back of lemma; geniculate; 6–6.2 mm long overall; not or scarcely exserted from spikelet; with twisted column. Palea 2.8–3 mm long. Rhachilla extension 1.2 mm long; pilose; with 1.5–1.6 mm long hairs.

FLOWER Lodicules 2. Anthers 3; linear, or oblong; 0.6–0.8 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform. 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.