E-Flora BC: Electronic Atlas of the Flora of British Columbia

General:
Perennial, densely tufted grass from fibrous roots, sometimes from short rhizomes less than 5 cm long; stems 4-30 cm tall.

Leaves:
Sheaths smooth; blades 3-7 cm long, less than 2 mm wide, flat, becoming folded; ligules 1-2.5 mm long.

Flowers:
Inflorescence narrowly cylindrical, more or less constricted, usually dense, 2-8 cm long, the branches ascending to erect or appressed, the lower ones 0.5-1.5 cm long, the spikelets numerous, few or none near the branch base; glumes 2-2.5 mm long, rough short-hairy on the keels, pointed; lemmas 1.5-2 mm long, awnless, the callus hairs sparse to abundant, to 0.2 mm long; paleas absent; anthers 0.5-0.7 mm long.

Notes:
See comments under A. humilis.