Flora of North America species comparison

20-110 cm, erect or ascending.

34-70 cm, erect or ascending, glabrous or puberulent below the panicle.

densely short-pubescent or glabrous;

auricles absent;

ligules 1.5-2 mm, glabrous, obtuse, erose;

blades 4-20 cm long, 1-5 mm wide, flat, both surfaces pubescent or glabrous.

4-16 cm long, 2-3 cm wide, erect, open;

branches sometimes longer than the spikelets, slender, usually ascending, slightly curved or straight.

3-15 cm long, 2-6 cm wide, open, erect;

branches (at least some) 1-3+ cm, ascending to spreading, never drooping, usually visible, with 1 or 2 spikelets.

12-20 mm, lanceolate, terete to moderately laterally compressed;

florets 5-6, bases concealed at maturity;

rachilla internodes 1-1.5 mm, concealed at maturity.

30-50 mm, longer than the panicle branches, not densely crowded, with parallel sides or widening distally, moderately laterally compressed, with 6-10 florets.

smooth to scabrous;

lower glumes 4-6 mm, (3)5-veined;

upper glumes 4-7 mm, 7-veined;

lemmas 6.5-8 mm long, 3-4.5 mm wide, elliptic to lanceolate, coriaceous, backs smooth, distinctly 7(9)-veined, not ribbed, rounded over the midvein, margins scabrous, rounded, not inrolled at maturity, apices acute to obtuse, bifid, teeth shorter than 1 mm;

awns 5-9 mm, all more or less equal in length, straight, arising less than 1.5 mm below the lemma apices;

anthers 1.5-3 mm.

pilose, margins hyaline;

lower glumes 5-10 mm, 1-veined;

upper glumes 10-15 mm, 3-veined;

lemmas 12-20 mm, linear-lanceolate, often arcuate, pubescent, with longer hairs near the margins, 5-7-veined, rounded over the midvein, margins hyaline, apices acuminate, teeth 1.5-3 mm;

awns 12-23 mm, straight or arcuate, arising 1.5 mm or more below the lemma apices;

anthers 0.5-1 mm.

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

sheaths densely hairy, hairs stiff, often retrorse;

upper sheaths glabrous or pubescent;

ligules 1-2 mm, glabrous or hairy, erose;

blades 7-18 cm long, 1-4 mm wide, pilose on both surfaces.

= 28.

= 28.