Deyeuxia vicunarum

HABIT Perennial; caespitose. Culms erect; 5–25 cm long. Culm-internodes smooth, or scaberulous. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 0.5–2 mm long. Leaf-blades curved, or flexuous; filiform; involute; 2–4.5 cm long; 1 mm wide. Leaf-blade surface scaberulous. Leaf-blade margins scabrous. Leaf-blade apex acute.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; linear, or oblong; 2–6 cm long; 0.7–1.1 cm wide.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels scabrous; glabrous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5.5–6.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.5–0.7 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex acute. Upper glume lanceolate; 5.5–6.5 mm long; 1.6 length of adjacent fertile lemma; membranous; purple; 1-keeled. Upper glume surface scabrous. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 3.5–4 mm long; membranous; without keel. Lemma apex dentate; 3–4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.2–0.25 way up back of lemma; geniculate; 5.5–6 mm long overall; with twisted column. Rhachilla extension 0.5 mm long; pubescent; with 0.8–1.3 mm long hairs.

FLOWER Lodicules 2. Anthers 3. Stigmas 2.

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

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

NOTES Aveneae. Tovar 1995.

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