Deyeuxia petelotii

HABIT Perennial; caespitose; clumped loosely. Culms erect; 25–40 cm long; 3 -noded. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 2 mm long; erose. Leaf-blades erect, or ascending; 4–8 cm long; 1–3 mm wide. Leaf-blade surface scabrous; rough on both sides. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle; embraced at base by subtending leaf.

Panicle open; lanceolate; loose; 6–10 cm long; with spikelets clustered towards branch tips. Panicle axis scabrous. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 0.5–1 mm long.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets elliptic; laterally compressed; 2 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet; firmer than fertile lemma; shiny; gaping. Lower glume lanceolate; 2 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 2 mm long; 0.7–0.8 length of adjacent fertile lemma; membranous; 1-keeled; 1 -veined. Upper glume primary vein scaberulous. Upper glume lateral veins absent. Upper glume apex acute.

FLORETS Fertile lemma linear; 2.5 mm long; membranous; without keel; 5 -veined. Lemma apex mucronate. Principal lemma awn subapical; 0.5 mm long overall. Palea 0.75 length of lemma; hyaline. Rhachilla extension glabrous.

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

FRUIT Caryopsis with adherent pericarp. Hilum linear.

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

NOTES Aveneae. Hitchcock 2002.

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