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

Bromus inermis Leyss.
smooth brome
Poaceae (Grass family)

Introduction to Vascular Plants

© Jamie Fenneman  Email the photographer   (Photo ID #17144)

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

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General:
Perennial grass from conspicuous rhizomes; stems smooth to hairy, 20-120 cm tall.
Leaves:
Sheaths smooth to stiff-hairy or soft-hairy; blades 3-10 mm wide, flat, smooth to soft-hairy or stiff-hairy; ear-shaped lobes at the bases of at least some of the leaves up to 1 mm long; ligules minutely jagged or more or less fringed with fine hairs, 0.5-2.5 mm long.
Flowers:
Inflorescence a narrow panicle, (5) 7-20 (27) cm long, the branches ascending to erect; spikelets 5- to 13-flowered, often strongly purplish-tinged, narrow, tapered from near the base, nearly circular in cross-section to somewhat compressed, 1.5-3 (5) cm long; glumes lanceolate, narrowly to broadly translucent-margined, the lower ones usually 1- (rarely 3-) nerved, 4-6 (8) mm long, the upper ones (3) 5-nerved, mostly smooth to strongly hairy, 6-10 mm long; lemmas smooth to hairy or rough, rounded on the backs, 10-13 mm long, the tips blunt, only shallowly bidentate, unawned and merely abruptly pointed or with awns 1-2 (4) mm long; paleas nearly equal to the lemmas; anthers 3, exserted, 4-6 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 over the Summer
Source:  The USDA

Habitat / Range

Moist to dry disturbed sites, fields, grassy slopes, meadows and forest edges in all but the alpine zone; ssp. inermis - infrequent in C, SC and SE BC, rare northward and westward; ssp. pumpellianus - frequent in BC east of the Coast-Cascade Mountains; ssp. inermis - introduced from Eurasia; ssp. pumpellianus - N to AK, YT and NT, E to AB and ON and S to CO.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Bromus inermis

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) 90 1234 2661
Slope Gradient (%) 0 23 101
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
10 175 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 3 8
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
254
Modal BEC Zone Class
ESSF
All BEC Zones (# of stations/zone) species was recorded in: AT(1), BG(27), BWBS(8), CWH(5), ESSF(63), ICH(16), IDF(62), IMA(8), MS(18), PP(11), SBPS(1), SBS(20), SWB(7)

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

Bromopsis inermis (Leyss.) Holub
Bromus inermis subsp. inermis Leyss.

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References