Calamagrostis rubescens Buckley
Poaceae (Grass family)

Introduction to Vascular Plants


© Jamie Fenneman     (Photo ID #17149)


E-Flora BC Static Map

Distribution of Calamagrostis rubescens
Click here to view the full interactive map and legend

Species Information

Perennial grass from fibrous roots and conspicuous rhizomes; stems unbranched, 60-100 cm tall, with 2 to 3 nodes.
Sheaths smooth to occasionally hairy above, the sheath summits usually with conspicuous tufted hairs; ligules 3-5 mm long, with jagged margins at the tips; leaf blades flat, rough or occasionally just hairy above, rough or smooth below, 8-40 cm long and 2-5 mm wide.
Inflorescence a congested to somewhat open panicle, pale or less often purplish, 6-15 (25) cm long, with the longer branches 2-4 cm long; spikelets 1-flowered; glumes long-pointed, 4-5 mm long, smooth to somewhat rough short-hairy, especially on the keels; lemmas 3-4 mm long, jagged and 4-toothed at the tips, with stout, strongly twisted and abruptly bent awns 3.5-4.5 mm long, attached near the base, the callus hairs of varying length, up to 1 mm long; rachillas about 1 mm long, with hairs to 2 mm.

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.

USDA Species Characteristics

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


Ecological Framework for Calamagrostis rubescens

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)
1149 100 2854
Slope Gradient (%)
25 0 240

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

189 0 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 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(1), BAFA(1), BG(23), BWBS(1), CWH(1), ESSF(545), ICH(900), IDF(2824), MS(1770), PP(186), SBPS(336), SBS(502)

Habitat and Range

Mesic to dry meadows, rocky slopes and open forests in the steppe to subalpine zones; common in S BC east of the Coast-Cascade Mountains; E to AB and S to CO, UT, NV and CA.

SourceThe Illustrated Flora of British Columbia


Synonyms and Alternate Names:
Calamagrostis fasciculata Kearney
Calamagrostis luxurians