Deschampsia baicalensis

HABIT Perennial; caespitose; clumped loosely. Culms decumbent; 40–80 cm long. Ligule an eciliate membrane. Leaf-blades flat, or conduplicate; 1–3 mm wide; coriaceous; stiff. Leaf-blade surface ribbed; scabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; lanceolate; 14–25 cm long. Panicle branches scaberulous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets lanceolate, or oblong; laterally compressed; 4–5.5 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; exceeding apex of florets; similar to fertile lemma in texture; shiny. Lower glume lanceolate; 4–5.5 mm long; 1 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 4–5.5 mm long; 1.3 length of adjacent fertile lemma; membranous; 1-keeled; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma oblong; 3–3.5 mm long; membranous; shiny; without keel; 5 -veined. Lemma apex erose, or dentate; 4 -fid; awned; 1 -awned. Principal lemma awn dorsal; arising 0.1 way up back of lemma; straight; 3–3.5 mm long overall; not or scarcely exserted from spikelet.

FLOWER Anthers 3; 1.5–1.8 mm long. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp. Hilum punctiform.

DISTRIBUTION Asia-temperate: Siberia.

NOTES Aveneae. Tsvelev 2011.

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