Avena volgensis (Vav.) Nevski - Volga oat.


Avena sativa subsp. sativa convar. volgensis Vav. ex Rod. et Sold.

Taxonomical position.

Family Poaceae Benth. genera Avena L.

Morphology and biology.

Annual cereal. Stalks upright or in the beginning lying, round, naked, smooth, thickness of 3-6 mm, height 30 cm - 2 m, with 3-4 naked or tomentous in nodes. Leaves lanceolate-pointed, rough, green or grey, it is frequent with wax for a short while, various length (20-45 cm) and width (8-30 mm), naked or on edges with cilia, sometimes leaf plate tomentous. Vaginas of bottom leaves in a various degree tomentous or naked. Uvula cone-shaped, 3-5 mm of length, or truncated, less often absolutely absent. Inflorescence is sprawling panicle. Spikelets 2-4 floral, connection of florets in spikelet strong, grains at trashing drop out in pairs. The top flower is usually underdeveloped. Spikelet scales two, top are little bit longer bottom, webby, wide lanceolate, the pointed, 25-30 mm of length, with 9-11 veins, at filmy forms in the sizes exceed florets. The internal floral scales is longer then external. Painting of floral scales white or yellow. The bottom floral scales lanceolate or obovate-lanceolate, 20-25 mm of length, tomentous or naked, smooth or rough, with 7-9 veins, on a top two-gear, on a back without awns or with one awn. All florets in an ear without joints and are separated only by breaking, forming almost horizontal platform of a break. Internode axes break off above, and axes of the second flower remains at the bottom flower.Lodicula oblique lanceolate. Stamens three. Ovary on all surface is dense tomentous. Stigmae two, plumose. Weevil filmy (densely captured by flower films, but not accreted with them), covered on all surface by pressed hairs, 8-11 mm of length, have clearly expressed longitudinal groove. Blossoms in May-August. Anemophilous. 2n=42.


The Volga region.


Rare impurity in crops of an oats, sometimes weed in crops of other cultures.

Use and economic value.

Has no.

The literature:

Cultural flora. V.2, p.3. An oats / Ed. V.D.Kobyljanskiy, V.N.Soldatov. - М.: "Kolos", 1994. - 367 p.
Tzvelev N.N. Cereals of the USSR. - L., "Nauka", 1976. - 788 p.

© Malyshev L.L.

Photos - © Dzjubenko E.A.

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