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

Bromus squarrosus L.
corn brome (hairy corn brome; squarrose brome)
Poaceae (Grass family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #26333)

E-Flora BC Static Map
Distribution of Bromus squarrosus
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Species Information

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General:
Annual grass from fibrous roots; stems erect to abruptly bent and ascending, 20-60 cm tall.
Leaves:
Lower sheaths densely soft-hairy to woolly, with long intertwined, curly hairs; blades (2) 3-8 mm wide, 5-15 cm long, flat, densely soft-hairy on both sides; ear-shaped lobes lacking at the leaf-bases; ligules more or less fringed with fine hairs, hairy on the back, more or less jagged, 1-1.5 mm long.
Flowers:
Inflorescence an open, nodding, racemose or nearly racemose panicle, 7-20 cm long, with all the branches and flowers on 1 side of the axis, the branches equalling or shorter than the spikelets; spikelets 8- to 30-flowered, somewhat compressed, broadly cylindrical or egg-shaped to lanceolate, smooth to short-hairy, 1.5-7 cm long, 7-15 mm wide; glumes smooth to rough, the lower ones 3- to 5- (7-) nerved, 4.5-7 mm long, the upper ones 7-nerved, 6-9 mm long; lemmas 7- to 9-nerved, firm-papery, smooth or more or less rough, somewhat compressed, with broadly translucent margins, 8-11 mm long, up to 6-8 mm wide, rounded at the tips, bidentate, awned, the awns flattened, sometimes twisted at the base, widely spreading at maturity, about 10 mm long, arising 1.5 mm or more below the lemma tips; anthers 1-1.3 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry to mesic fields, roadsides, disturbed sites and waste places in the steppe and montane zones; rare in WC, SC and SE BC; introduced from Eurasia.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Bromus squarrosus

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

Minimum

Average

Maximum

Elevation (metres) 435 787 1137
Slope Gradient (%) 0 20 41
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
115 244 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 3 5
Modal Nutrient Regime
Class
D
Number of field plots
 species was recorded in:
7
Modal BEC Zone Class
PP
All BEC Zones (# of stations/zone) species was recorded in: BG(2), IDF(2), PP(3)

Climate

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

Additional Photo Sources

General References