Deyeuxia przevalskyi

HABIT Perennial; caespitose; clumped loosely. Rhizomes short. Culms 4–10 cm long. Lateral branches lacking. Ligule an eciliate membrane. Leaf-blades 1.5–3.5 mm wide; glaucous. Leaf-blade surface scabrous; rough abaxially.

INFLORESCENCE Inflorescence a panicle; subtended by an inflated leaf-sheath.

Panicle spiciform; oblong, or ovate; 1.5–2.5 cm long; 1–1.5 cm wide.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4.5–6.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.33–0.5 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex acuminate. Upper glume lanceolate; 4.5–6.5 mm long; membranous; 1-keeled; 3 -veined. Upper glume surface scabrous. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 4 mm long; membranous; without keel; 5 -veined. Lemma apex awned; 1 -awned. Principal lemma awn dorsal; arising 0.1 way up back of lemma; geniculate; 5–6 mm long overall; with twisted column.

FLOWER Lodicules 2. Anthers 3. Stigmas 2.

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

DISTRIBUTION Asia-temperate: China.

NOTES Aveneae. Pl Cent Asia 1996.

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