Poaceae
Avenula

Avenula pubescens (Huds.) Dumort.

First published in Bull. Soc. Roy. Bot. Belgique 7: 68 (1868)
This species is accepted
The native range of this species is Europe to Mongolia and Caucasus. It is a perennial and grows primarily in the temperate biome.

Descriptions

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]

Morphology General Habit
Perennial; caespitose. Rhizomes short. Butt sheaths dark brown. Culms erect, or geniculately ascending; 30-100 cm long; 2-3 -noded. Leaves mostly basal. Leaf-sheaths hirsute. Ligule an eciliate membrane; 4-8 mm long. Leaf-blades 4-30 cm long; 2-6 mm wide. Leaf-blade venation distinct. Leaf-blade surface pubescent.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; lanceolate, or oblong; equilateral, or nodding; 10-18 cm long; 2-6 cm wide. Primary panicle branches bearing 1-3 fertile spikelets on each lower branch. Panicle branches scaberulous. Spikelets solitary. Fertile spikelets pedicelled. Pedicels 4-20 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 2-3 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 11-17 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes villous; hairy above; with 4-7 mm long hairs. Floret callus pilose.
Fertile
Spikelets comprising 2-3 fertile florets; with a barren rhachilla extension. Spikelets oblong; laterally compressed; 11-17 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes villous; hairy above; with 4-7 mm long hairs. Floret callus pilose.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet; thinner than fertile lemma; shiny. Lower glume lanceolate; 7-13 mm long; 0.7-0.8 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 10-15(-17) mm long; 1.1 length of adjacent fertile lemma; membranous; with hyaline margins; 1-keeled; 3 -veined. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 9-14 mm long; chartaceous, or cartilaginous; without keel; 5 -veined. Lemma surface scaberulous; rough above. Lemma apex erose; obtuse; awned; 1 -awned. Principal lemma awn dorsal; arising 0.5 way up back of lemma; geniculate; 12-20 mm long overall; with twisted column. Palea 0.8-0.9 length of lemma. Palea keels eciliate. Rhachilla extension 0.66-0.75 length of fertile floret; villous.
Morphology Reproductive morphology Flowers
Anthers 3; 4.5-6.5 mm long. Ovary pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; hairy at apex. Hilum linear.
Distribution
Europe: northern, central, southwestern, southeastern, and eastern. Asia-temperate: Siberia, Soviet Middle Asia, Caucasus, western Asia, China, and Mongolia. North America: eastern Canada and northeast USA.
Reference
Aveneae. TAC.
[GB]

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

  • Herbarium Catalogue Specimens

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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

  • Kew Science Photographs

    • Copyright applied to individual images