Deyeuxia diffusa

HABIT Perennial. Ligule an eciliate membrane.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; effuse; 30 cm long. Primary panicle branches 6 -nate; 7–15 cm long. Panicle branches capillary; smooth.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 2.5–3 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 1 length of lemma.

GLUMES Glumes persistent; similar; reaching apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 2.5–3 mm long; 1.4 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 1.7–2.2 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma oblong; 2–2.2 mm long; membranous; without keel; 5 -veined. Lemma apex entire; emarginate, or obtuse; muticous. Palea 0.75 length of lemma. Rhachilla extension 0.6 mm long; pilose; with 1–1.5 mm long hairs.

FLOWER Lodicules 2. Anthers 3; 0.6 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; oblong; 1.5 mm long. Hilum punctiform. Disseminule comprising a floret.

DISTRIBUTION Asia-temperate: China.

NOTES Aveneae. Keng 1995.

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