Flora of North America species comparison

6-30 cm, decumbent to erect.

8-45 cm, erect.

forming a dense, bristly basal tuft;

ligules 0.7-2.3 mm, dorsal surfaces scabridulous, apices truncate to obtuse, often erose, sometimes lacerate or ciliolate;

blades 2-5 cm long, less than 1 mm wide, soon becoming tightly inrolled and rigid.

usually mostly cauline, sometimes mostly basal;

sheaths glabrous or pubescent;

upper sheaths usually inflated;

ligules 1.4-4.5 mm, dorsal surfaces scabridulous, apices truncate to acute, lacerate to erose;

blades 3-15 cm long, 0.7-2.5 mm wide, flat, becoming involute, finely scabrous.

2-8 cm long, 0.2-0.6 cm wide, narrowly cylindric, spikelike, dense, occasionally interrupted near the base, the base often enclosed by the upper sheaths;

branches to 2 cm, scabrous, strongly appressed, hidden by the spikelets;

pedicels 0.5-7 mm.

2-12 cm long, 0.4-2 cm wide, cylindrical, spikelike, dense, occasionally lobed or interrupted near the base, appearing bristly from the awns, usually exserted from the upper sheaths at maturity;

branches 0.3-1.5 cm, scabrous to scabridulous, ascending to appressed, spikelet-bearing to the base and hidden by the spikelets;

pedicels 0.3-3 mm.

lanceolate to narrowly ovate, greenish to purplish.

lanceolate, greenish to yellowish, tinged with purple.

1.8-4 mm, often 3-veined, midveins scabrous to smooth, acute to acuminate;

calluses glabrous;

lemmas 1.5-2.5 mm, 5-veined, veins obscure or prominent distally, extending as teeth to 0.2 mm, unawned or awned from above midlength, awns to 1.2 mm, usually scarcely exceeding the lemma apices, straight;

paleas to 0.3 mm, thin;

anthers 3, 0.7-2 mm.

equal to subequal, 2.5-5 mm, scabrous over the midvein and often scabridulous on the body, 1-veined, apices narrowly acuminate to awn-tipped, awns to 1.5 mm;

callus hairs to 0.5(1) mm, usually dense;

lemmas 1.5-2.3 mm, scabrous, translucent to opaque, 5-veined, veins prominent distally, apices acute, veins extended into 2(4) teeth, teeth 0.1-0.5 mm, awned from about midlength or above, awns 3.5-8 mm, geniculate;

paleas absent, or to 0.2 mm and thin;

anthers 3, 0.4-0.6 mm, often retained at the apices of the caryopses.

1-1.5 mm;

endosperm liquid.

0.9-1.3 mm;

endosperm soft.

= 42.

= 56.