E-Flora BC: Electronic Atlas of the Flora of British Columbia

Bromus commutatus Schrad.
meadow brome
Poaceae (Grass family)

Introduction to Vascular Plants
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E-Flora BC Static Map
Distribution of Bromus commutatus
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Species Information

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Annual grass from fibrous roots; stems erect, usually more or less short-hairy at the nodes and just below, 20-90 (120) cm tall.
Sheaths usually open for 1-2 cm, densely soft-hairy, the hairs spreading to slightly angled backwards; blades 2-5 (9) mm wide, flat, hairy; ear-shaped lobes lacking at the leaf-bases; ligules usually hairy, sometimes smooth, jagged and usually more or less fringed with fine hairs, 0.5-1.5 (3) mm long.
Inflorescence a loose panicle, mostly 7-15 (20) cm long, the branches ascending to stiffly spreading but rarely wavy; spikelets 5- to 9- (11-) flowered, flattened, lanceolate, smooth or rough short-hairy, 13-20 mm long, the stalks mostly longer than the spikelets; lower glumes lanceolate, (3) 5-nerved, 5-7 mm long, the upper ones lanceolate, (5-) 7- (9-) nerved, 6-9 mm long; lemmas rough with faint nerves, somewhat compressed from top to bottom, (8) 9-10 (11) mm long, rounded at the tips, bidentate, awned, the awns straight to somewhat abruptly bent, 4-10 mm long; paleas 1-2 mm shorter than the lemmas; anthers mostly included in the lemmas, 1-1.5 (2) mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to dry disturbed sites, meadows and open forests in the lowland, steppe and montane zones; infrequent in S BC; introduced from Europe.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Bromus commutatus

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 377 574 955
Slope Gradient (%) 0 28 52
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
20 180 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 2 5
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: BG(5), ICH(2), IDF(7), PP(2)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

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General References