Deyeuxia glacialis

HABIT Perennial. Rhizomes short. Culms erect; 30–55 cm long. Leaf-sheaths scaberulous. Ligule an eciliate membrane; 4–6 mm long; truncate. Leaf-blades involute; 5–18 cm long; 2–3 mm wide; stiff. Leaf-blade surface scabrous. Leaf-blade margins scabrous. Leaf-blade apex pungent.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; linear; flexuous; 10–20 cm long; 2–2.5 cm wide.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels puberulous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 7–8 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent. Floret callus hairs 0.5–0.8 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; 1 -veined. Lower glume primary vein smooth, or scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 7–8 mm long; 1.3 length of adjacent fertile lemma; membranous; 1-keeled. Upper glume primary vein smooth, or scaberulous. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 5.3–6.3 mm long; membranous; without keel. Lemma surface scabrous. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; geniculate; 3–4 mm long overall; with twisted column. Rhachilla extension 2 mm long; villous; with 3–4 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.

NOTES Aveneae. Tovar 1995.

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