Deyeuxia filifolia

HABIT Perennial; caespitose. Culms erect; 20–50 cm long. Ligule an eciliate membrane. Leaf-blades flexuous; filiform; involute; 6–15 cm long; 1 mm wide; coriaceous. Leaf-blade surface scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; 5–12 cm long; 1–2.5 cm wide. Primary panicle branches spreading; branching divaricately.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels pubescent.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4.5–5.3 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; 4.5–5.5 mm long; 1 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume primary vein ciliolate. Lower glume lateral veins absent. Lower glume surface glabrous, or puberulous. Lower glume apex acute. Upper glume lanceolate; 4.5–5.5 mm long; membranous; purple; 1-keeled; 3 -veined. Upper glume primary vein ciliolate. Upper glume surface glabrous, or puberulous. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 3.5–4.5 mm long; membranous; without keel; 5 -veined. Lemma surface puberulous. Lemma apex dentate; 3–4 -fid; awned; 1 -awned. Principal lemma awn dorsal; geniculate; 5–7 mm long overall; with a straight or slightly twisted column. Rhachilla extension 1.5–2 mm long; pubescent; hairy throughout but longer above; with 0.5–1 mm long hairs.

FLOWER Lodicules 2. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION South America: western South America and southern South America.

NOTES Aveneae. Gr Peru 1997.

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