Deyeuxia uralensis

HABIT Perennial. Rhizomes elongated. Culms erect; 80–120 cm long. Ligule an eciliate membrane; 2–4 mm long; lacerate; obtuse. Leaf-blades 4–5 mm wide. Leaf-blade surface scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; oblong; 10–20 cm long. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 6–8 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 4 mm long; 0.9–1 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 apex acuminate. Upper glume lanceolate; 1.3–1.7 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 4.5 mm long; membranous; without keel; 5 -veined. Lemma apex awned; 1 -awned. Principal lemma awn dorsal; arising 0.25–0.33 way up back of lemma; straight; 5–6 mm long overall; without a column. Rhachilla extension 1 mm long; pilose; with 4–4.5 mm long hairs.

FLOWER Lodicules 2. Anthers 3. Stigmas 2.

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

DISTRIBUTION Europe: eastern.

NOTES Aveneae. Fl USSR 1995.

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