Perennial, densely tufted or matted grass, from rhizomes up to 5 cm long; stems 10-75 cm tall.
Sheaths smooth; blades 3-10 cm long, 1-5 mm wide, flat; ligules wider than long, 0.5-2.5 mm long.
Inflorescence broadly egg-shaped, open, 3-20 cm long, with a lack of spikelets adjacent to the main axis, the spikelets well-spaced on the branches, none or only a few of these near the base, the lower branches 1.5-4.5 cm long, broadly spreading; glumes 1.7-3 mm long; lemmas 1.3-2.5 mm long, the callus hairs absent or sparse to 0.1 mm long; rachillas absent; paleas 0.6-1.2 mm long, at least 1/2 as long as the lemmas; anthers 0.8-1.3 mm long.
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.
Illustration Source: The Illustrated Flora of British Columbia
Present over the Summer
Source: The USDA
||Value / Class
Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
of field plots
species was recorded in:
BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in
|CWH(6), ESSF(4), ICH(3), MS(1)|
Source: Klinkenberg 2013
Synonyms and Alternate Names:
Agrostis sylvatica Huds.
Agrostis tenuis Sibth.
Agrostis tenuis var. aristata (Parnell) Druce
Agrostis tenuis var. hispida (Willd.) Philipson
Agrostis tenuis var. pumila (L.) Druce
Agrostis vulgaris With.