Flora of North America species comparison

20-90 cm, erect or decumbent, puberulent below the panicle.

40-120 cm, erect or ascending.

softly pilose, hairs often retrorse or spreading;

auricles absent;

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

blades 3.5-27 cm long, 1-9 mm wide, both surfaces pilose.

13-25 cm long, 2-12 cm wide, erect to spreading;

branches 1-7 cm, stiffly erect to ascending or spreading, with 1 or 2 spikelets.

7-16 cm long, 3-6 cm wide, open, erect to ascending;

branches sometimes longer than the spikelets, slender, ascending to spreading.

25-70 mm, sides parallel or diverging distally, moderately laterally compressed, with 4-11 florets.

14-18(30) mm, oblong-lanceolate, terete to moderately laterally compressed, not purple-tinged;

florets 4-9(11), bases concealed or visible at maturity;

rachilla internodes 1.5-2 mm, concealed or visible at maturity.

smooth or scabrous, margins hyaline;

lower glumes 15-25 mm, 1-3-veined;

upper glumes 20-35 mm, 3-5-veined;

lemmas 20-35 mm, linear-lanceolate, scabrous, 7-veined, rounded over the midvein, margins hyaline, apices bifid, acuminate, teeth 3-5 mm;

awns 30-65 mm, straight, arising 1.5 mm or more below the lemma apices;

anthers 0.5-1 mm.

usually glabrous, sometimes scabrous or pubescent;

lower glumes 5-7 mm, 5-veined;

upper glumes 6-9 mm, 7(9)-veined;

lemmas 8-11.5 mm long, 1.7-2.6 mm wide, elliptic to lanceolate, coriaceous, backs usually glabrous, distinctly 7(9)-veined, not ribbed, rounded over the midvein, margins scabrous or pubescent, bluntly angled, inrolled or not at maturity, apices acute to obtuse, bifid, teeth shorter than 1 mm;

awns 3-10 mm, straight, arising less than 1.5 mm below the lemma apices, awn of the lowest lemma shorter than the others;

anthers 0.7-1.7 mm.

equaling or shorter than the paleas, weakly to strongly inrolled.

sheaths densely hairy, hairs stiff, often retrorse;

upper sheaths pubescent or glabrous;

ligules 1-2.5 mm, glabrous or pilose, obtuse, ciliolate;

blades 9-18 cm long, 2-4 mm wide, pilose on both surfaces.

= 42, 56.

= 14, 28, 56.