Perennial, loosely tufted grass from fibrous roots, rhizomes and stolons, these shoots stout, to 4 m long; stems erect or decumbent, stout, 10-60 cm tall/long.
Sheath margins open about 1/2 their length, sheaths hairless or sparsely rough, the projections pointed downward; sterile shoots mainly emerging inside sheaths with well developed two-keeled buds protecting the scales; blades 2-4 mm wide, somewhat curved, in-rolled, thick, outer surface smooth, inner surface of sterile shoots usually distinctly rough or minutely soft-hairy; ligules 1-5 mm long, the tips rounded to sharp-pointed, the backs rough.
Inflorescence an erect panicle, 3-15 cm long, congested, often interrupted; stalks smooth to moderately rough, hairless; central axis and branches slightly to moderately rough, branches 1 to 2 per node; spikelets laterally compressed, 9-16 mm long, 3- to 6-flowered; lower glumes 3-nerved, the upper ones usually more than 7 mm long; rachillas smooth, silky-hairy (rarely hairless); lemmas lanceolate, (6) 7.5-11 mm long, the tips sharp-pointed, 5- to 7- (11-) nerved, surface smooth or rough, the keels, marginal nerves and some lateral nerves minutely soft- to short silky-hairy, smooth and hairless to rough or minutely soft-hairy between the nerves; calluses hairless, diffusely short-cobwebby, or with a crown of wavy hairs; palea keels rough; flowers unisexual; anthers vestigial or 2-5 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 Spring
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:
Poa douglasii subsp. macrantha (Vasey) D.D. Keck
Poa douglasii var. macrantha (Vasey) Boivin