Deyeuxia recta

HABIT Perennial; caespitose. Culms erect; 35–90 cm long. Leaf-sheaths smooth, or scaberulous; glabrous on surface. Ligule an eciliate membrane; 2–5 mm long. Leaf-blades involute; 15–40 cm long; 2–4 mm wide; stiff. Leaf-blade surface scaberulous, or scabrous; rough on both sides.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; lanceolate; continuous, or interrupted; 11–25 cm long; 1.8–2.8 cm wide. Primary panicle branches appressed; 4–8 cm long.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels pubescent.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6–6.75 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; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 6–6.75 mm long; 1.2 length of adjacent fertile lemma; membranous; 1-keeled. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 4.8–5.4 mm long; membranous; without keel. Lemma surface scaberulous, or scabrous; rough above. Lemma apex erose; awned; 1 -awned. Principal lemma awn dorsal; arising 0.33–0.5 way up back of lemma; geniculate; 7–8.5 mm long overall; with twisted column. Rhachilla extension 2–3 mm long; pubescent; with 1–1.3 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.

NOTES Aveneae. Tovar 1995.

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