Flora of North America species comparison

20-110 cm, erect or ascending.

30-70 cm, erect or spreading;

nodes 3-5, pubescent.

densely pubescent to pilose;

auricles absent;

ligules 2-3 mm, lanceolate, pubescent, obtuse, erose;

blades 7-20 cm long, 3-7 mm wide, flat, usually pubescent to pilose, rarely glabrous.

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

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

8-15 cm, open, drooping;

branches ascending to spreading.

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.

20-30 mm, elliptic to lanceolate, terete to moderately laterally compressed, with 4-7 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.

glabrous or hispidulous;

lower glumes 6-9 mm, 1-veined;

upper glumes 8-10.5 mm, 3-veined, usually acute, rarely mucronate;

lemmas 9-15 mm, lanceolate, rounded over the midvein, glabrous, sometimes scabrous, apices subulate to acute, entire;

awns 4-8 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 3-5 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.