Perennial grass from rhizomes to about 10 cm long, rhizomes sometimes absent, not forming a turf and including many non-flowering shoots; stems 10-70 cm tall, scattered.
Sheaths smooth; blades 1.5-5 cm long, 1-6 mm wide, flat, becoming in-rolled; ligules 1.5-6 mm long, rough-hairy outside.
Inflorescence lanceolate to narrowly constricted, at least twice as long as wide, the branches ascending, 2-5 cm long; spikelets numerous; glumes 2-3 mm long; lemmas 1.5-2.5 mm long, awnless or rarely with straight awns to 0.5 mm long, from below the tips, calluses with sparse hairs to 0.25 mm long; paleas absent or if present, thin membranes to 0.2 mm long; anthers 1-1.7 mm long.
This is a rare species or group of species formerly thought to be confined to sand dunes but now known to occur inland in habitats subject to extreme summer drought.
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
Source: Klinkenberg 2013
Synonyms and Alternate Names:
Agrostis diegoensis Vasey
Agrostis lepida Hitchc.
Agrostis pallens var. vaseyi H. St. John