Deyeuxia effusiflora

HABIT Perennial. Ligule an eciliate membrane.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; effuse; 20–35 cm long. Primary panicle branches ascending, or spreading; 4–5 -nate; whorled at most nodes; 10–15 cm long. Panicle axis scaberulous. Panicle branches capillary; flexuous; scaberulous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels scaberulous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 3.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 1 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 3.5 mm long; 1.1 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume primary vein ciliate. Lower glume lateral veins absent. Lower glume surface asperulous. Lower glume apex obtuse. Upper glume elliptic; 3 mm long; 1 length of adjacent fertile lemma; membranous; purple; 1-keeled; 3 -veined. Upper glume surface asperulous. Upper glume apex obtuse.

FLORETS Fertile lemma oblong; 3 mm long; membranous; without keel; 5 -veined. Lemma apex dentate; 4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0–0.1 way up back of lemma; geniculate; 5 mm long overall; with twisted column. Palea 3 mm long. Rhachilla extension pilose; with 1.5–2 mm long hairs.

FLOWER Lodicules 2. Anthers 3. Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform. Disseminule comprising a floret.

DISTRIBUTION Asia-temperate: China.

NOTES Aveneae. Rendle 1995.

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