Flora of North America species comparison

5-90 cm, erect, slender, puberulent below the panicle.

(9)20-40 cm, erect or ascending.

usually densely and softly retrorsely pubescent to pilose, upper sheaths sometimes glabrous;

auricles absent;

ligules 2-3 mm, glabrous, obtuse, lacerate;

blades to 16 cm long, 1-6 mm wide, both surfaces softly hairy.

sparsely pubescent or glabrous;

ligules 0.8-1.5 mm, glabrous or hairy, obtuse;

blades 5-20 cm long, 2-5 mm wide, abaxial surfaces glabrous, adaxial surfaces pilose.

5-20 cm long, 3-8 cm wide, open, lax, drooping distally, usually 1-sided;

branches 1-4 cm, drooping, usually 1-sided and longer than the spikelets, usually at least 1 branch with 4-8 spikelets.

2-7 cm long, 1-4 cm wide, erect, dense, obovoid, wedge-shaped at the base, sometimes interrupted;

branches shorter than the spikelets, erect, straight or almost so, sometimes verticillate.

10-20 mm, usually shorter than the panicle branches, sides parallel or diverging distally, moderately laterally compressed, often purplish-tinged, not densely crowded, with 4-8 florets.

12-25 mm, lanceolate, crowded, terete to moderately laterally compressed;

florets 5-10, bases concealed at maturity;

rachilla internodes concealed at maturity.

villous, pubescent, or glabrous, margins hyaline;

lower glumes 4-9 mm, 1-veined;

upper glumes 7-13 mm, 3-5-veined;

lemmas 9-12 mm, lanceolate, glabrous or pubescent to pilose, 5-7-veined, rounded over the midvein, margins hyaline, often with some hairs longer than those on the backs, apices acuminate, hyaline, bifid, teeth 0.8-2(3) mm;

awns 10-18 mm, straight, arising 1.5 mm or more below the lemma apices;

anthers 0.5-1 mm.

scabrous to pubescent;

lower glumes 3-4 mm, 3-5-veined;

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

lemmas 7-10 mm long, 1.5-2 mm wide, lanceolate, glabrous, obscurely 7-veined, rounded over the midvein, margins rounded, not inrolled at maturity, apices sharply acute, bifid, teeth shorter than 1 mm;

awns 7-10 mm, flattened at the base, divaricate or recurved when mature, arising 1.5 mm or more below the lemma apices;

anthers 0.3-0.5 mm.

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

= 14.

= 14.