Brachypodium distachyon (L.) P.Beauv.

First published in Ess. Agrostogr.: 101, 155 (1812)
This species is accepted
The native range of this species is Macaronesia to India. It is an annual or perennial and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Annual. Culms geniculately ascending, or decumbent; 3-30 cm long. Leaf-sheaths pilose. Ligule an eciliate membrane. Leaf-blades 1-12 cm long; 1-6 mm wide; glaucous. Leaf-blade surface pilose; sparsely hairy.
Morphology Reproductive morphology Inflorescences
Inflorescence composed of racemes. Racemes 1; single; bilateral; 2-8(-10) cm long; bearing few fertile spikelets; bearing 1-7 fertile spikelets on each. Spikelet packing broadside to rhachis. Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong; 0.5-1 mm long.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 5-16 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 10-30 mm long; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 5-16 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 10-30 mm long; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; dissimilar; shorter than spikelet. Lower glume lanceolate; 5-6 mm long; 0.75 length of upper glume; coriaceous; without keels; 5-7 -veined. Lower glume lateral veins ribbed. Lower glume apex acute. Upper glume oblong; 7-8 mm long; 0.75 length of adjacent fertile lemma; coriaceous; without keels; 7 -veined. Upper glume lateral veins ribbed. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; laterally compressed; 8-10 mm long; coriaceous; glaucous; without keel; 7 -veined. Lemma surface glabrous, or pilose. Lemma margins ciliolate; hairy above. Lemma apex acute; awned; 1 -awned. Principal lemma awn 8-12 mm long overall. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; ciliate. Anthers 3; 0.5-1 mm long. Ovary pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; ellipsoid; hairy at apex. Embryo 0.25 length of caryopsis. Hilum linear; 1 length of caryopsis.
Distribution
Europe: southwestern, southeastern, and eastern. Africa: north, Macaronesia, northeast tropical, south, and middle Atlantic ocean. Asia-temperate: Soviet Middle Asia, Caucasus, western Asia, Arabia, China, and eastern Asia. Asia-tropical: India. Australasia: Australia. North America: northwest USA, northeast USA, southwest USA, and Mexico. South America: western South America and southern South America.
Reference
Brachypodieae. Fl Iraq.
[GB]

Sources

  • GrassBase - The Online World Grass Flora

    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Herbarium Catalogue Specimens

    • 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 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 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 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 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