OregonFlora species comparison

sometimes swollen at the base.

more or less evenly distributed;

sheaths open except occasionally at base; uppermost sheaths sometimes somewhat inflated;

ligules truncate to acuminate; hyaline;

blades flat, sometimes revolute.

dense terminal panicles; ovoid to cylindric, sometimes interrupted; the spikelets borne singly or in clusters; if in clusters then the spikelets of 2 forms; the lower staminate or sterile and the upper bisexual or pistillate;

disarticulation below the sterile florets in species with solitary spikelets; at the base of the cluster or sometimes below the bisexual or pistillate spikelets in species with clustered spikelets.

laterally compressed with 1–3(4) florets; the terminal floret sexual; lower florets; if present, sterile.

subequal; longer than the florets, 1–5-veined, keeled; the keels often winged.

sterile florets reduced to tiny knobs, linear; bristle-like structures or lanceolate lemmas to 75% as long as the bisexual florets; terminal florets bisexual or in spikelet clusters sometimes staminate or sterile).

of terminal florets leathery to hard; acute to acuminate or beaked; awnless; shiny, glabrous or hairy, inconspicuously 5-veined.

similar in texture to the lemmas, enclosed by the lemmas at maturity, 1-veined.

3.