Perennial, creeping grass from rhizomes and leafy stolons rooting at the nodes, vigorously spreading, the stolons 5-150 cm long; stems 8-100 cm tall.
Sheaths smooth; blades 2-10 cm long, 2-8 mm wide, flat; ligules 2-5 mm long.
Inflorescence narrowly egg-shaped, more or less constricted, dense, the lower branches 2-6 cm long, appressed to the axis except briefly during flowering; spikelets densely clustered; glumes 1.6-3 mm long; lemmas 1.4-2 mm long, awnless except rarely with short, straight awns from near the tips, the callus hairs sparse, to 0.5 mm long; paleas 0.7-1.4 mm long, at least 1/2 as long as the lemmas; anthers 0.9-1.4 mm long.
See comments under A. gigantea.
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
|BG(7), BWBS(1), CDF(26), CWH(16), ESSF(4), ICH(6), IDF(11), MH(2), MS(3), PP(2), SBS(3)|
Source: Klinkenberg 2013
Synonyms and Alternate Names:
Agrostis alba var. palustris (Huds.) Pers.
Agrostis alba var. stolonifera (L.) Sm.
Agrostis maritima Lam.
Agrostis palustris Huds.
Agrostis stolonifera var. compacta Hartm.
Agrostis stolonifera var. palustris (Huds.) Farw.