Flora of North America species comparison

2-70 cm, erect or ascending.

10-40 cm, erect or ascending, often puberulent below the panicle.

softly pubescent to pilose;

auricles absent;

ligules 1-3(4) mm, pubescent, obtuse, lacerate;

blades to 15 cm long, 1-5 mm wide, flat, pubescent on both surfaces.

1-13 cm long, 1-4 cm wide, erect, usually ovoid, open, becoming dense, occasionally reduced to 1 or 2 spikelets;

branches shorter than the spikelets, ascending to erect, straight or almost so.

2-10 cm long, 2-5 cm wide, erect, dense, often reddish brown;

branches 0.1-1 cm, ascending, never drooping, not readily visible, with 1 or 2 spikelets.

(11)14-20(23) mm, lanceolate, terete to moderately laterally compressed;

florets 5-10, bases concealed at maturity;

rachilla internodes concealed at maturity.

18-25 mm, much longer than the panicle branches, densely crowded, subsessile, with parallel sides or widening distally, moderately laterally compressed, with 4-8 florets.

pilose or glabrous;

lower glumes 5-7 mm, 3-5-veined;

upper glumes 6.5-8 mm, 5-7-veined;

lemmas 6.5-11 mm long, 3-5 mm wide, lanceolate, chartaceous, antrorsely pilose to pubescent, or glabrous proximally or throughout, 7-9-veined, lateral veins prominently ribbed, rounded over the midvein, hyaline margins abruptly or bluntly angled, not inrolled at maturity, apices acute, bifid, teeth shorter than 1 mm;

awns 6-8 mm, usually arising less than 1.5 mm below the lemma apices, straight to recurved at maturity;

anthers 0.6-1.5 mm.

pilose, margins hyaline;

lower glumes 5-8 mm, 1(3)-veined;

upper glumes 8-12 mm, 3-5-veined;

lemmas 10-15 mm, linear-lanceolate, pubescent to pilose, 7-veined.

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

sheaths densely, often retrorsely, pilose;

upper sheaths pubescent or glabrous;

ligules 1-1.5 mm, hairy, obtuse, erose;

blades 2-19 cm long, 1-4 mm wide, abaxial surfaces glabrous or hairy, adaxial surfaces hairy.

over the midvein, margins hyaline, apices acuminate, teeth 1-3 mm;

awns 8-20 mm, straight, reddish, arising 1.5 mm or more below the lemma apices;

anthers 0.5-1 mm.

= 28.

= 14, 28.