Deyeuxia veresczaginii

HABIT Perennial; caespitose; clumped loosely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Culms erect; 50–80 cm long; 4 mm diam.; (1–)2 -noded. Culm-internodes smooth; distally glabrous. Culm-nodes glabrous. Leaf-sheaths smooth; glabrous on surface. Ligule a ciliolate membrane; 3–5 mm long; scaberulous on abaxial surface. Leaf-blades flat, or conduplicate; 2–5(–7) mm wide; stiff; grey-green. Leaf-blade surface ribbed; grooved adaxially; scabrous; rough abaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle open, or contracted; linear, or lanceolate; 8–12 cm long; 1.5–3 cm wide. Panicle branches scaberulous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 4–6 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus bearded. Floret callus hairs 0.66–0.75 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 4–6 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Lower glume apex attenuate. Upper glume lanceolate; 4–6 mm long; membranous; 1-keeled. Upper glume surface scabrous. Upper glume apex attenuate.

FLORETS Fertile lemma lanceolate, or ovate; membranous; without keel; 5 -veined. Lemma surface scabrous. Lemma apex dentate; obtuse; awned; 1 -awned. Principal lemma awn dorsal; arising 0.33 way up back of lemma; straight; 2–4 mm long overall. Rhachilla extension 0.5–1 mm long; pilose.

FLOWER Anthers 3; 1.8–2 mm long.

DISTRIBUTION Asia-temperate: Siberia.

NOTES Aveneae. Zolotuchkin 2006.

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