Elymus jacutensis (Drobov) Tzvelev - Yakutian Couch, Yakutian Wild Rye.

Taxonomic position.

Family Poaceae Benth. genus Elymus L.

Morphology and biology.

Perennial grass. Forms loose mats. Culms (25)40-80 cm tall, quite often with decumbent bases of shoots. Nodes usually glabrous, rarely with few short hairs. Sheaths glabrous, smooth; leaf blades (2)3-6 mm wide, flat, glabrous, scabrous. Spikes (5)6-12 cm long, erect, rather dense, but with remote lower spikelets (rachis segments 15-30 mm long), usually greenish, less often with poor pink-violet tinge. Spikelets 12-17 mm long, 3-5(7)-flowered. Rachilla segments densely hairy. Glumes 5-9 mm long, 3-5-veined, lanceolate, shortly awned, glabrous or more or less hairy, scabrous at veins. Lemma 8-11(12) mm long, lanceolate, long-sharpened, with awn 2-8(9) mm long, shortly hairy in lower half or almost throughout surface. Anthers mm long. Flowers in July - August. Anemophilous. 2n=28.


West and East Siberia, Far East, Alaska, Northwestern Canada.


On sandy-shingly alluvions in river valleys and lakesides, less often in tundra belt or tundra zone on stony slopes and in valley meadows.

Use and economic value.

Forage grass.


Kharkevich SS., ed. 1985. Vascular plants of the Soviet Far East. V.1. Leningrad: Nauka. 398 p. (In Russian).
Malyshev LI., Peshkova GA., ed. 1990. Flora of Siberia. V.4. Poaceae (Gramineae). Novosibirsk: Nauka. 361 p. (In Russian).
Tzvelev NN. 1976. Grasses of the Soviet Union. Leningrad: Nauka. 788 p. (In Russian).

© L.L.Malyshev

© Photo by N.Yu.Malysheva, L.L.Malyshev

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