Deyeuxia kalarica

HABIT Perennial; caespitose; clumped densely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Culms erect; 20–40 cm long. Lateral branches lacking. Leaf-sheaths smooth; glabrous on surface. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane; 3–5 mm long. Leaf-blades flat, or conduplicate; 2–5 mm wide. Leaf-blade surface smooth; glabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; linear; 3–9 cm long. Panicle branches scaberulous; rough distally.

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 0.33–0.5 length of lemma.

GLUMES Glumes persistent; similar; exceeding apex of florets; firmer than fertile lemma; gaping. Lower glume lanceolate; 1 length of upper glume; membranous; purple; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 4–6 mm long; 1.3 length of adjacent fertile lemma; membranous; purple; 1-keeled; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 3–4.5 mm long; membranous; without keel; 5 -veined. Lemma surface scaberulous. Lemma apex awned; 1 -awned. Principal lemma awn dorsal; arising 0.33 way up back of lemma; geniculate; 4–5 mm long overall; with twisted column. Palea hyaline; 2 -veined. Rhachilla extension 1–2 mm long; villous.

FLOWER Lodicules 2; lanceolate; membranous. Anthers 3; 1.6–2.5 mm long. Stigmas 2.

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

DISTRIBUTION Asia-temperate: Siberia.

NOTES Aveneae. Tsvelev 1996.

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