Pseudoroegneria spicata (Pursh) Á. Löve
bluebunch wheatgrass
Poaceae (Grass family)

Introduction to Vascular Plants


© Reg Newman     (Photo ID #12183)


E-Flora BC Static Map

Distribution of Pseudoroegneria spicata
Click here to view the full interactive map and legend

Species Information

Perennial, tufted grass from fibrous roots, often forming clumps up to 150 cm wide; stems 60-130 cm tall, erect, slender, green or glaucous.
Mostly stem leaves; sheaths usually smooth or minutely hairy, the hairs pointed downward; blades 1-4 mm wide, flat to loosely in-rolled, usually smooth below, short-hairy above, rarely hairy on both surfaces; ear-shaped lobes at the leaf-bases well-developed; ligules scarcely 1 mm long, minutely ragged and fringed.
Inflorescence a spike, 8-16 mm long, middle internodes 0.8-2.5 cm apart; spikelets 5- to 8-flowered, mostly 1 spikelet per node; glumes 6-15 mm long, 0.9-2.2 mm wide, nerves evenly smooth or rough; lemmas 10-14 mm long, nerved, awned or unawned, the awns 0-20 mm long.
Awned and unawned specimens differ by a single gene, a difference that some taxonomists (Barkworth 1994) feel does not merit separate taxonomic recognition. Most BC plants are unawned. A key to the two forms follows:

1. Lemmas awned, 10-20 mm long, widely divergent........................... ssp. Spicata

1. Lemmas unawned or nearly so, 0-2 mm long, straight ............................ssp. inermis (Scribn. & J.G. Sm.) A. Love

SourceThe Illustrated Flora of British Columbia


Ecological Framework for Pseudoroegneria spicata

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)
863 170 2400
Slope Gradient (%)
33 0 360

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

198 0 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
2 0 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

AT(9), BG(829), BWBS(4), ESSF(97), ICH(128), IDF(1520), MS(202), PP(624), SBPS(12), SBS(9)

Habitat and Range

Dry, open grasslands, shrublands, rocky slopes and forest openings in the steppe and montane zones; common in SC and SE BC, rare elsewhere in BC; N to AK and YT, E to MB and S to TX, NM, AZ and NE CA.

SourceThe Illustrated Flora of British Columbia