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

Bromus briziformis Fisch. & C.A. Mey.
rattlesnake grass (rattlesnake brome; rattlesnake chess)
Poaceae (Grass family)

Introduction to Vascular Plants

© Curtis Bjork  Email the photographer   (Photo ID #21964)

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Distribution of Bromus briziformis
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Species Information

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General:
Annual grass from fibrous roots; stems densely hairy at the bases, 20-60 cm tall.
Leaves:
Sheaths usually open for 1-2 cm, densely soft-hairy; blades 2-5 mm wide, flat or slightly in-rolled, soft-hairy to short-hairy; ear-shaped lobes lacking at the leaf-bases; ligules hairy, eroded, 0.5-1.5 mm long.
Flowers:
Inflorescence a panicle, 4-12 cm long, with the branches and flowers more or less all to one side of the axis, the branches slender, lax, usually curved to reflexed, mostly bearing solitary spikelets; spikelets 9- to 15-flowered, compressed, cylindrical to egg-shaped, smooth, 15-30 mm long, 8-12 mm wide; florets mostly small, closed, self-fertilized; glumes lanceolate, the lower ones 3- to 5-nerved, 4-6 mm long, the upper ones (5-) 7- to 9-nerved, 7-9 mm long; lemmas inflated, 9-11 mm long, 2.8-4 mm wide, rounded at the tips, unawned, or with awn tips scarcely over 1 mm long; paleas 1-3 mm shorter than the lemmas; anthers, rarely exserted, about 0.8 mm long.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Yellow
Blooming Period:
Late Spring
Fruit/Seed characteristics:
Colour: Brown
Present from Spring to Summer
Source:  The USDA

Habitat / Range

Dry meadows, roadsides and waste places; rare in SE BC; introduced from Eurasia.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Bromus briziformis

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) 502 709 1000
Slope Gradient (%) 5 31 46
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
98 199 256
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 2 4
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
8
Modal BEC Zone Class
PP
All BEC Zones (# of stations/zone) species was recorded in: ICH(1), IDF(2), PP(4)

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 brizaeformis Fischer & C. Meyer [orthographic variant]

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References