Poaceae
Avena

Avena volgensis (Vavilov) Nevski

First published in Trudy Sredne-Aziatsk. Gosud. Univ., Ser. 8b, Bot. 17: 5 (1934)
This species is accepted
The native range of this species is E. Europe. It is an annual and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Annual. Culms erect, or geniculately ascending; 60-150 cm long. Lateral branches lacking. Ligule an eciliate membrane. Leaf-blades 15-30 cm long; 2-6 mm wide. Leaf-blade surface glabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; elliptic; 15-25 cm long. Spikelets pendulous; solitary. Fertile spikelets pedicelled. Pedicels filiform.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 3-4 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 20-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.5 mm long. Floret callus evident; 1 mm long; obtuse; fracturing irregularly.
Fertile
Spikelets comprising 3-4 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; laterally compressed; 20-25 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.5 mm long. Floret callus evident; 1 mm long; obtuse; fracturing irregularly.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; reaching apex of florets; thinner than fertile lemma; gaping. Lower glume lanceolate; 20-25 mm long; 1 length of upper glume; membranous; without keels; 7 -veined. Lower glume apex acuminate. Upper glume elliptic; 20-25 mm long; 1.3-1.5 length of adjacent fertile lemma; membranous; without keels; 9 -veined. Upper glume apex acuminate.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; 14-18 mm long; coriaceous; much thinner above; without keel; 7 -veined. Lemma lateral veins absent or obscure below. Lemma apex dentate; 2-4 -fid; muticous.
Morphology Reproductive morphology Flowers
Anthers 3. Ovary pubescent all over.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; sulcate on hilar side; hairy all over. Hilum linear. Disseminule comprising a floret.
Distribution
Europe: eastern.
Reference
Aveneae. Zlaki 1997.
[GB]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/172270/6861635

Conservation
DD - data deficient
[IUCN]

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: not threatened. Confidence: confident
[AERP]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • GrassBase - The Online World Grass Flora

    • Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora.
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0