Deyeuxia abnormis

HABIT Annual. Culms rambling; slender; 50–100 cm long; wiry. Culm-internodes smooth; distally glabrous. Culm-nodes glabrous. Leaf-sheaths mostly shorter than adjacent culm internode; striately veined; glabrous on surface. Ligule an eciliate membrane; 1–2 mm long. Leaf-blades 6–12 cm long; 2–4 mm wide. Leaf-blade surface scabrous; rough on both sides. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; effuse; 11 cm long; 8 cm wide; bearing few spikelets. Panicle axis smooth; glabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels filiform; tip widened.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets elliptic; laterally compressed; 3.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.5 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 3.5 mm long; 1.1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex setaceously attenuate. Upper glume lanceolate; 3 mm long; 1.1 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex setaceously attenuate.

FLORETS Fertile lemma ovate; 2.75 mm long; chartaceous; without keel; 5 -veined. Lemma apex muticous. Palea 1.5 mm long; 0.5 length of lemma; hyaline. Rhachilla extension pilose.

FLOWER Lodicules 2; membranous. Anthers 3; 0.5 mm long.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Asia-temperate: China. Asia-tropical: India.

NOTES Aveneae. Bor 2002.

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