Bromus inermis Leyss.

First published in Fl. Halens.: 16 (1761), nom. cons. prop.
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

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

  • 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 2023. 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 2023. 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