Flora of North America species comparison

6-30 cm, decumbent to erect.

4-20 cm.

smooth, upper sheaths inflated;

ligules (0.6)1-1.5 mm, dorsal surfaces scabrous, apices truncate to rounded, lacerate to erose-ciliolate;

blades 1-2.5 cm long, 1-2 mm wide, flat or folded.

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.

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.

1.5-6 cm long, 0.4-2 cm wide, initially lanceolate, becoming ovate and diffuse, bases sometimes enclosed in the upper sheaths;

branches 1-3 cm, erect to spreading, scabrous;

pedicels 0.5-6.3 mm.

lanceolate to narrowly ovate, greenish to purplish.

ovate, green, slightly to strongly 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, 2-2.5 mm, 1-veined, acuminate;

lower glumes scabrous on the midvein;

upper glumes smooth or scabrous on the midvein;

callus hairs to 0.1 mm, sparse;

lemmas 1.3-1.7 mm, scabrous, translucent to opaque, 5-veined, veins mostly obscure, apices truncate, entire, erose, or the veins excurrent to about 0.12 mm, unawned;

paleas to 0.2 mm, thin;

anthers 3, 0.5-0.9 mm, often retained at the apices of the caryopses.

1-1.5 mm;

endosperm liquid.

1.2-1.5 mm;

endosperm semisoft.

= 42.

= unknown.