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

Bromus racemosus L.
bald brome (smooth brome)
Poaceae (Grass family)

Introduction to Vascular Plants

© Adolf Ceska  Email the photographer   (Photo ID #20807)

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

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General:
Annual grass from fibrous roots; stems erect or ascending, 20-110 cm tall.
Leaves:
Lower sheaths densely soft-hairy, the hairs often directed downwards, the upper sheaths smooth to hairy; blades soft-hairy on both sides, 1.5-4 mm wide, flat; ear-shaped lobes lacking at the leaf-bases; ligules smooth or hairy, jagged, 1-2 mm long.
Flowers:
Inflorescence an erect, narrow panicle, 4-16 cm long, the branches slender, ascending; spikelets 5- to 7- (9-) flowered, slightly compressed, 10-20 mm long; florets mostly small, closed, self-fertilizing; spikelet stalks usually shorter than the spikelets; glumes lanceolate, smooth to rough, prominently nerved, the lower ones (3) 5-nerved, 4-6 mm long, the upper ones 7-nerved, 4-7 mm long; lemmas rough, distinctly but not prominently 7- (9-) nerved, smooth on the backs, rough on the margins, somewhat compressed from top to bottom, 6.5-8 mm long, the tips rounded, bidentate, awned, the awns 5-9 mm long; anthers 1.5-3 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic to dry disturbed sites and waste places in the lowland, steppe and montane zones; rare in S BC; introduced from Eurasia.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Bromus racemosus

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) 335 656 914
Slope Gradient (%) 0 11 24
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
112 190 293
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
Modal Nutrient Regime
Class
Number of field plots
 species was recorded in:
16
Modal BEC Zone Class
BG
All BEC Zones (# of stations/zone) species was recorded in: BG(15), IDF(1)

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.

Synonyms and Alternate Names

Bromus commutatus Schrad.
Bromus commutatus var. apricorum Simonkai
Bromus popovii Drobow

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References