Bromus pacificus Shear
Pacific brome
Poaceae (Grass family)

Introduction to Vascular Plants

Photograph

© Hans Roemer     (Photo ID #22953)


Map

E-Flora BC Static Map

Distribution of Bromus pacificus
Click here to view the full interactive map and legend

Species Information

General:
Perennial grass from fibrous roots, but sometimes rooting at the lower nodes; stems smooth to hairy at the nodes, 60-150 (200) cm tall.
Leaves:
Sheaths usually open for 1-2 cm, strongly soft-hairy to smooth with long fine hairs at the throats; blades (4) 6-10 (15) mm wide, flat, commonly sparsely soft-hairy at least on the upper surfaces, but sometimes smooth; ear-shaped lobes lacking at the leaf-bases; ligules strongly hairy, jagged, brown, 2-5 mm long.
Flowers:
Inflorescence an open, nodding panicle, 15-30 cm long, the branches elongate, spreading to drooping, usually bearing spikelets only towards the tips; spikelets loosely (5-) 7- to 11-flowered, somewhat compressed, 20-30 (35) mm long; florets small, closed, self-fertilizing; glumes lanceolate, usually short-hairy, long-pointed, the lower ones 1 (3)-nerved, 6-9 mm long, the upper ones 3- (5- to 7-) nerved, 9-10 mm long; lemmas rough to short-hairy evenly over the entire surface, rounded to slightly keeled on the backs, 11-14 mm long, the tips long-pointed, shallowly bidentate, awned, the awns 4-10 mm long; anthers exserted, 1-3 (4) mm long.

SourceThe Illustrated Flora of British Columbia

Illustration

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Ecology

Ecological Framework for Bromus pacificus

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

Avg

Min

Max

Elevation (metres)
71 0 248
Slope Gradient (%)
15 0 80

Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]

135 35 270
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 2 6
Modal Nutrient Regime
Class
E
# of field plots
 species was recorded in:
15
Modal BEC Zone Class
CWH

All BEC Zones (# of stations/zone) species was recorded in

CDF(2), CWH(13)

Habitat and Range

Moist to mesic coastal meadows, beaches, thickets and open forests in the lowland zone; infrequent in coastal BC; N to SW AK and S to OR.

SourceThe Illustrated Flora of British Columbia

Synonyms

Synonyms and Alternate Names:
Bromopsis pacifica (Shear) Holub