Deyeuxia setiflora

HABIT Perennial; caespitose. Culms 9–12 cm long. Ligule an eciliate membrane; 3–4.5 mm long. Leaf-blades conduplicate, or involute; 1–2 mm wide. Leaf-blade surface glabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; oblong; 3–4 cm long; 0.8–1 cm wide.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5–5.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 1–1.5 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; 5–5.5 mm long; 1.6–1.7 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 3–3.5 mm long; membranous; without keel. Lemma apex lobed; 4 -fid; awned; 5 -awned. Principal lemma awn dorsal; geniculate; 6–7 mm long overall; with twisted column. Lateral lemma awns arising on apex of lobes; 1.5–2 mm long. Rhachilla extension 2 mm long; pilose.

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. =Calamagrostis coronalis. Tovar 1995.

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