Poaceae
Bromus

Bromus lanceolatus Roth

First published in Catal. Bot. 1: 18 (1797)
This species is accepted
The native range of this species is Medit. to Xinjiang and Pakistan. It is an annual and grows primarily in the temperate biome.

Descriptions

Morphology General Habit
Annual. Culms erect, or geniculately ascending; 20-85 cm long. Culm-nodes glabrous, or bearded. Leaf-sheaths pubescent. Ligule an eciliate membrane. Leaf-blades 4-20 cm long; 2-6 mm wide. Leaf-blade surface glabrous, or pubescent.
Morphology Reproductive morphology Inflorescences
Inflorescence a panicle. Panicle open; lanceolate, or ovate; (2-)6-12(-20) cm long; 2-8 cm wide. Primary panicle branches ascending, or spreading. Spikelets solitary. Fertile spikelets pedicelled.
Morphology Reproductive morphology Inflorescences Spikelets
Spikelets comprising 8-20 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or oblong; laterally compressed; (12-)25-50 mm long; 6-16 mm wide; breaking up at maturity; disarticulating below each fertile floret.
Fertile
Spikelets comprising 8-20 fertile florets; with diminished florets at the apex. Spikelets lanceolate, or oblong; laterally compressed; (12-)25-50 mm long; 6-16 mm wide; breaking up at maturity; disarticulating below each fertile floret.
Morphology Reproductive morphology Inflorescences Bracts Glume
Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 5-9 mm long; 0.6-0.8 length of upper glume; membranous; without keels; 3 -veined. Lower glume surface glabrous, or hirsute. Lower glume apex acute. Upper glume lanceolate; 8-12 mm long; 0.5-0.66 length of adjacent fertile lemma; membranous; without keels; 7-9 -veined. Upper glume surface glabrous, or hirsute. Upper glume apex acute.
Morphology Reproductive morphology Flowers Florets
Fertile lemma lanceolate; (8.5-)12-18 mm long; 5-6 mm wide; chartaceous; without keel; 7-9 -veined. Lemma surface glabrous, or hirsute. Lemma apex dentate; 2 -fid; with lobes 1-2.5 mm long; awned; 1 -awned. Principal lemma awn subapical; spreading and briefly coiled at base of limb (sometimes); flat below; 6-12 mm long overall. Palea keels ciliate; adorned sparsely. Apical sterile florets resembling fertile though underdeveloped.
Morphology Reproductive morphology Flowers
Lodicules 2; membranous. Anthers 3; 0.5-2 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: southwestern and southeastern. Africa: north and Macaronesia. Asia-temperate: Soviet Middle Asia, Caucasus, western Asia, Arabia, and China. Asia-tropical: India. Australasia: Australia. North America: northeast USA and south-central . South America: southern South America.
Reference
Bromeae. Acedo 1996.
[GB]

Sources

  • 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

    • 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