Elymus mutabilis (Drobov) Tsvelev - Mutable Couch, Narrow-glumed Couch.

Taxonomic position.

Family Poaceae Barnhart, genus Elymus L.


Agropyron mutabile Drobov, A. angustiglume Nevski, Roegneria mutabilis (Drobov) Hyl.

Morphology and biology.

Perennial cespitose plant. Leaves flat, rather wide, scabrous, with (very rarely without) long patent hairs above. Spikes straight or slightly bent, dense, more or less elongate, green or sometimes violet-colored. Glumes slightly shorter than adjacent lemma, with 4-5 thick pale scabrous veins, broadly lanceolate, gradually narrowed into short cusp or awn, sometimes with a tooth near apex, with scarious margin, more or less hairy inside. Lemma scabrous or shortly hairy, gradually narrowed into short cusp or awn up to 5-6 mm long. Palea keel with dense short spinules or ciliate. Cross-pollinated anemophilous plant. Flowers in June, fruits in August. 2n=28.


Northern European part of the former USSR, Arctic, West and East Siberia, Far East, southeastern part of Kazakhstan.


In light-coniferous and deciduous, mainly forb forests, in forest meadows, fringes; with valley meadows and streamside shingles reaches high mountains, where it occurs in forest and subalpine meadows, near stone fields. In Arctic zone, tends to nival grass sites, stony and shingly riversides, riverine meadows.

Use and economic value.

Forage grass in conditions of the North.


Tolmachev AI., ed. 1964. Arctic Flora of the USSR. V.2. Gramineae. Moscow; Leningrad: Nauka. 273 p. (In Russian).
Kharkevich SS., ed. 1985. Vascular plants of the Soviet Far East. V.1. Leningrad: Nauka. 398 p. (In Russian).
Fedorov AA., ed. 1974. Flora of the European part of the USSR. V.1. Leningrad: Nauka. 404 p. (In Russian).
Pavlov NV., ed. 1956. Flora of Kazakhstan. V.1. Alma-Ata. 354 p. (In Russian).
Rozhevits RYu., Shishkin BK., eds. 1934. Flora URSS. V.2. 778 p. (In Russian).
Malyshev LI., Peshkova GA., eds. 1990. Flora of Siberia. V.4. Poaceae (Gramineae). Novosibirsk: Nauka. 361 p. (In Russian).
Malyshev LI., Peshkova GA., eds. 1979. Flora of the Central Siberia. V.1. 536 p. (In Russian).
Tzvelev NN. 1976. Grasses of the Soviet Union. Leningrad: Nauka. 788 p. (In Russian).
Hulten E., Fries M. 1986. Atlas of North European vascular plants north of the Tropic of Cancer. V.1-3. Konigstein: Koeltz Scientific Books.

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