Perennial, loosely to densely tufted grass from fibrous roots, short-lived, sometimes stoloniferous; stems 25-120 cm tall.
Sheaths compressed, rough, margins open about 1/2-3/4 their length; sterile shoots sometimes trailing and rooting at nodes; blades 1-5 mm wide, flat, lax, not prow-tipped; ligules 3-10 mm long, the tips sharp-pointed to long-pointed, the backs rough.
Inflorescence an erect or lax panicle, 8-25 cm long, pyramidal, open, the branches 3 to 7 per node, spreading, distinctly rough angled, crowded; spikelets laterally compressed, 2.3-3.5 mm long, 2- to 4-flowered; lower glumes often sickle-shaped, 1-nerved; rachillas smooth or minutely bumpy; lemmas lanceolate, 2.3-3.5 mm long, the tips sharp-pointed, the surface smooth or rough, the keels and rarely the marginal nerves short silky-hairy below, lateral nerves prominent; calluses cobwebby; palea keels smooth, minutely bumpy, or slightly rough; flowers bisexual; anthers 1.3-2 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
|CDF(42), CWH(3), ESSF(4), ICH(2), MS(3)|
Source: Klinkenberg 2013
Synonyms and Alternate Names:
Poa attica Boiss. & Heldr.