Deyeuxia hirta

HABIT Perennial. Culms geniculately ascending; 85 cm long. Leaf-sheaths longer than adjacent culm internode; glabrous on surface. Ligule an eciliate membrane; 1 mm long; obtuse. Leaf-blades 10–25 cm long; 3 mm wide. Leaf-blade surface glabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; oblong; interrupted; 15 cm long; 2 cm wide.

Spikelets solitary. Fertile spikelets pedicelled.

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 pilose. Floret callus hairs 1 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 5.5–6.5 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein ciliolate. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 5.5–6.5 mm long; 1.1–1.3 length of adjacent fertile lemma; membranous; 1-keeled. Upper glume primary vein ciliolate. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 5 mm long; membranous; without keel; 5 -veined. Lemma lateral veins excurrent (1–2mm). Lemma surface glabrous. Lemma apex dentate; 4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; geniculate; 6–7 mm long overall; with 4–5 mm long limb. Palea 2 mm long; 2 -veined. Palea keels approximate. Rhachilla extension 1.3 mm long; pilose; with 1–2 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. Swallen 2002.

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