Deyeuxia ajanensis

HABIT Perennial; caespitose; clumped densely. Culms erect; 40–50(–110) cm long. Culm-internodes antrorsely scabrous. Lateral branches lacking. Ligule an eciliate membrane. Leaf-blades 12–25 cm long; (6–)8–10 mm wide; stiff; glaucous. Leaf-blade surface smooth; glabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; oblong; continuous, or interrupted; 9–12 cm long; 1.3–2 cm wide.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 8–11 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose. Floret callus hairs 0.15–0.25 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 8–11 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex attenuate. Upper glume lanceolate; 8–11 mm long; 1.5 length of adjacent fertile lemma; membranous; 1-keeled. Upper glume apex attenuate.

FLORETS Fertile lemma oblong; 5–7 mm long; membranous; without keel; 5 -veined. Lemma apex awned; 1 -awned. Principal lemma awn dorsal; arising 0.1–0.25 way up back of lemma; geniculate; 9.5–12.5 mm long overall. Palea 1 length of lemma.

FLOWER Stigmas 2.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Asia-temperate: Soviet far east.

NOTES Aveneae. Chark & Prob 2006.

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