GrassBase - The Online World Grass Flora


W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Deyeuxia nyingchiensis

HABIT Perennial; caespitose. Culms erect; 50–80 cm long; 2–3 -noded. Lateral branches lacking. Leaf-sheaths smooth, or antrorsely scabrous. Ligule an eciliate membrane; 4–5 mm long. Leaf-blades flat, or involute; 10–15 cm long; 1–3 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 7–12 cm long; 5–8 cm wide. Primary panicle branches ascending, or spreading; 3–6 -nate; whorled at most nodes; 2–8 cm long. Panicle branches arcuate; scabrous.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels curved; scaberulous.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 5–7 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.33 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 5–7 mm long; 1 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex acuminate. Upper glume lanceolate; 5–7 mm long; 1.6–2 length of adjacent fertile lemma; membranous; purple; 1-keeled; 3 -veined. Upper glume surface scabrous. Upper glume apex acuminate.

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 0.66–0.75 way up back of lemma; straight; 4 mm long overall. Palea 0.66 length of lemma; hyaline; 2 -veined. Rhachilla extension 1–1.5 mm long; villous; with 3.5–4 mm long hairs.

FLOWER Anthers 3; 1 mm long.

DISTRIBUTION Asia-temperate: China.

NOTES Aveneae. Fl China 2005.

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