Poaceae
Bromus

Bromus inermis Leyss.

First published in Fl. Halens.: 16 (1761), nom. cons.
This species is accepted
The native range of this species is Temp. Eurasia. It is a perennial or rhizomatous geophyte 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; culms solitary, or caespitose. Rhizomes elongated. Butt sheaths glabrous to pubescent; persistent and investing base of culm; with fibrous dead sheaths. Culms 30-100 cm long. Culm-internodes distally pubescent. Culm-nodes glabrous, or pubescent. Leaf-sheaths glabrous on surface, or puberulous. Ligule an eciliate membrane. Leaf-blades 10-35 cm long; 4-8 mm wide. Leaf-blade surface scabrous; rough on both sides; glabrous. Leaf-blade margins scabrous.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open, or contracted; ovate; dense; equilateral, or nodding; 10-15 cm long; 4-10 cm wide. Primary panicle branches 3-4 -nate; 1-10 cm long; bearing 1-2 fertile spikelets on each lower branch. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 6-13 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 15-25 mm long; 3-5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent.
Fertile
Spikelets comprising 6-13 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 15-25 mm long; 3-5 mm wide; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; shorter than spikelet. Lower glume lanceolate; 6-9 mm long; 0.75 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume lanceolate; 9-11 mm long; 1 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume apex obtuse.
Morphology Reproductive morphology Flowers Florets
Fertile lemma oblong; 9-12 mm long; chartaceous; mid-green, or purple; without keel; 5-7 -veined. Lemma surface glabrous, or pubescent; hairy below. Lemma apex dentate; 2 -fid; muticous, or awned; 1 -awned. Principal lemma awn subapical; 5-10 mm long overall. Palea 1 length of lemma. Palea keels ciliolate. Palea surface glabrous, or pubescent; hairy on back. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; 0-1.5 mm long; membranous. Anthers 3; 4-5.5 mm long. Ovary with a fleshy appendage above style insertion; pubescent on apex.
Morphology Reproductive morphology Fruits
Caryopsis with adherent pericarp; hairy at apex; apex fleshy. Hilum linear.
Distribution
Europe: northern, central, southwestern, southeastern, and eastern. Africa: north and south. Asia-temperate: Siberia, Soviet far east, Soviet Middle Asia, Caucasus, western Asia, China, Mongolia, and eastern Asia. Asia-tropical: India. Australasia: Australia and New Zealand. North America: Subarctic, western Canada, eastern Canada, northwest USA, north-central USA, northeast USA, southwest USA, south-central USA, and Mexico. South America: western South America and southern South America.
Reference
Bromeae. Acedo 1996.
[GB]

Sources

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

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

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    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

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    • 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