Poa laxiflora Buckley
lax-flowered bluegrass (looseflower bluegrass)
Poaceae (Grass family)

Introduction to Vascular Plants


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E-Flora BC Static Map

Distribution of Poa laxiflora
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Species Information

Perennial, loosely tufted grass from fibrous roots and long rhizomes or with isolated shoots; stems 50-120 cm tall.
Sheaths usually rough, the projections pointed downward, the margins open 1/4-1/2 their length; blades 3-6 mm wide, flat, narrowly prow-tipped; ligules 2-3.5 mm long, the backs smooth or slightly rough.
Inflorescence a panicle, 14-30 cm long, open, sparse, the branches mostly 1 to 2 per node, widely spreading, the longest 5.5-12 cm long, slightly to moderately rough-angled; spikelets laterally compressed, 4-8 mm long, 2- to 4-flowered; lower glumes 1- to 3-nerved; rachilla internodes about 1 mm long, smooth, hairless; lemmas lanceolate, 3.2-6 mm long, the tips sharp-pointed, surface smooth or sparsely rough, the keels and marginal nerves sparsely short silky-hairy, lateral nerves rarely sparsely, minutely soft-hairy and moderately prominent, hairless between the nerves; calluses cobwebby; palea keels more or less rough, hairless; flowers bisexual, normal (rarely bulbiferous); anthers 0.5-1.1 mm long.

SourceThe Illustrated Flora of British Columbia


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.


Ecological Framework for Poa laxiflora

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




Elevation (metres)
1387 670 2035
Slope Gradient (%)
23 0 75

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

308 28 344
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 1 8
Modal Nutrient Regime
# of field plots
 species was recorded in:
Modal BEC Zone Class

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

ESSF(8), IDF(7), MS(3), SBPS(1)

Habitat and Range

Moist old-growth forests and rocky slopes in the lowland and montane zones; infrequent in and W of the Coast-Cascade Mountains; N to SE AK and S to NW OR.

SourceThe Illustrated Flora of British Columbia