Flora of North America species comparison

60-170 cm, erect;

nodes (5)6-8, pubescent;

internodes usually glabrous, sometimes pubescent near the nodes.

5-40 cm, erect or ascending.

pilose, midrib of the culm leaves not abruptly narrowed just below the collar;

auricles absent;

ligules 2-4 mm, glabrous, truncate, erose or lacerate;

blades 20-35(37) mm long, 6-16 mm wide, flat, abaxial surfaces glabrous, adaxial surfaces pilose.

glabrous or pubescent;

ligules 1.2-2.6 mm, puberulent, obtuse, laciniate;

blades 2-15 cm long, 2-5 mm wide, pubescent on both surfaces.

10-25 cm, open, nodding;

branches ascending, spreading, or drooping.

2-12 cm long, 1-5 cm wide, dense, ovoid, stiffly erect, sometimes racemose;

branches shorter than the spikelets, ascending, slightly curved or straight.

20-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with (4)6-10 florets.

10-40(45) mm long, 4-10 mm wide, lanceolate to elliptic or oblong, laterally compressed;

florets 5-8(10), bases concealed at maturity;

rachilla internodes concealed at maturity.

pubescent;

lower glumes 6-8.5 mm, 1(3)-veined;

upper glumes 8-11.5 mm, 3-veined, not mucronate;

lemmas 10-12 mm, lanceolate, rounded over the midvein, backs pubescent, margins more densely so, apices acute, entire;

awns 3.5-7 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 2-4 mm.

glabrous or pubescent;

lower glumes 5-8.5 mm, 3-5-veined, lanceolate;

upper glumes 6.5-9.5 mm, 7-9(11)-veined, elliptic;

lemmas 8-12(13.5) mm long, 6-7 mm wide, oblanceolate, veins glabrous, scabridulous, or ciliolate, glabrous or pubescent elsewhere, 9-11-veined, rounded over the midvein, margins broadly hyaline, bluntly angled above the middle, not inrolled at maturity, apices subulate to acute or obtuse, toothed, teeth shorter than 1 mm;

awns usually 3 on the upper lemmas in each spikelet, arising 2-4 mm below the lemma apices, purple or deep red, central awn 5-25 mm, flattened at the base, divaricate and sometimes twisted at maturity, lateral awns 4-10 mm, erect or reflexed, sometimes absent or much reduced on the lower lemmas;

anthers 1-1.8 mm.

equaling or shorter than the paleas, thin, weakly inrolled or flat.

= 28.

= 14.