Deyeuxia nardifolia

HABIT Perennial; caespitose; clumped densely. Culms erect; 7–15 cm long; 1 -noded. Leaf-sheaths scaberulous; glabrous on surface. Ligule an eciliate membrane; 2.5–3 mm long; pubescent on abaxial surface; acuminate. Leaf-blades curved; filiform; involute; 2–5 cm long; 0.5 mm wide. Leaf-blade surface scaberulous; glabrous. Leaf-blade apex pungent.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; oblong; 1–5 cm long; 0.8–1 cm wide. Primary panicle branches spreading; whorled at most nodes.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels pubescent.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5–6.8 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.5–1 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 3 -veined. Lower glume primary vein scabrous. Lower glume apex acute. Upper glume lanceolate; 5–6.8 mm long; 1.1 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scabrous. Upper glume lateral veins absent. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 4.5–5.5 mm long; membranous; without keel; 5 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.4–0.5 way up back of lemma; geniculate; 5.5 mm long overall; with twisted column. Palea 4–5 mm long. Rhachilla extension 1 mm long; 0.66 length of fertile floret; pilose.

FLOWER Lodicules 2. Anthers 3; 2 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; lanceolate; 1.8 mm long. Hilum punctiform. Disseminule comprising a floret.

DISTRIBUTION South America: southern South America.

NOTES Aveneae. Turpe 1995.

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