Deyeuxia ecuadoriensis

HABIT Perennial; caespitose. Butt sheaths persistent and investing base of culm; with fibrous dead sheaths. Basal innovations intravaginal. Culms 20–30 cm long; 1 mm diam. Culm-internodes distally hispid. Leaf-sheaths longer than adjacent culm internode; striately veined; glabrous on surface. Ligule an eciliate membrane; 0.5–1 mm long; truncate. Leaf-blades involute; 3–7 cm long; 0.3–1 mm wide. Leaf-blade surface ribbed; grooved adaxially; puberulous; hairy adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear; 8–10 cm long; 1 cm wide. Panicle axis hispid.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels ciliate.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 3.5–4 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; purple; 1-keeled; keeled above; 3 -veined. Lower glume lateral veins obscure. Lower glume surface scabrous; glabrous. Lower glume apex erose; obtuse. Upper glume lanceolate; 3.5–4 mm long; 1.1 length of adjacent fertile lemma; membranous; 1-keeled; keeled above; 3 -veined. Upper glume lateral veins obscure. Upper glume surface scabrous. Upper glume apex erose; obtuse.

FLORETS Fertile lemma lanceolate; 3 mm long; membranous; without keel; 5 -veined. Lemma surface scabrous. Lemma apex obtuse; muticous. Palea 2 mm long. Palea keels scabrous. Rhachilla extension 1.5 mm long; pilose; with 1–1.5 mm long hairs.

FLOWER Lodicules 2. Anthers 3; 0.8–1 mm long; purple. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Disseminule comprising a floret.

DISTRIBUTION South America: western South America.

NOTES Aveneae. Laegaard 2001.

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