Annual tufted grass (rarely longer-lived), from fibrous roots, sometimes from stolons; stems 2-20 (45) cm tall.
Sheath margins open about 2/3 their length; sterile shoots emerging inside sheaths with indistinct, two-keeled buds protecting the scales; blades 1-3 mm wide, flat, thin; ligules 0.5-3 mm long, the backs smooth, hairless.
Inflorescence an erect panicle, 1-10 cm long, 1.2-1.6 times longer than wide, the branches 1 to 2 (3) per node, ascending to spreading or reflexed; spikelets laterally compressed, 3-5 mm long, 2- to 6-flowered; lower glumes 1-nerved; rachillas smooth, hairless, more or less concealed, terminal internodes less than 1/2 (3/4) length of terminal lemmas; lemmas lanceolate, 2.5-4 mm long, the tips rounded to sharp-pointed, surface smooth, keel, marginal, and often lateral nerves silky- to minutely crisply- or soft-hairy (rarely hairless throughout), lateral nerves moderately prominent; calluses hairless; palea keels silky-hairy; flowers bisexual, or the upper ones in a spikelet female; anthers 0.6-1.1 mm long, cylindrical prior to opening.
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 from Spring to 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
|BWBS(3), CWH(1), MS(1), SBS(1)|
Source: Klinkenberg 2013
Synonyms and Alternate Names:
Poa annua var. aquatica Asch.
Poa annua var. reptans Hausskn.