Flora of North America species comparison

40-130 cm, to 1 mm thick at the nodes, unbranched, leafy for 50% of their height.

40-120 cm, to 1 mm thick at the nodes, rarely branched, leafy for 80% of their height.

glabrous;

collars glabrous;

ligules 0.2-0.4 mm, entire;

blades (8)15-35(40) cm long, 3-8(11) mm wide, linear-lanceolate, usually glabrous, sometimes sparsely pilose adaxially.

glabrous;

collars glabrous;

ligules 0.2-0.3 mm, entire;

blades 9-16(33) cm long, 4-7 mm wide, lanceolate-fusiform, glabrous adaxially.

(7)12-35(47) cm, contracted, erect;

branches ascending to appressed;

axils of panicle branches glabrous;

pedicels 0.5-2.5 mm.

(9)12-17(29) cm, open, erect;

branches ascending to divergent;

axils of panicle branches scabrous;

pedicels 0.5-2 mm.

4-9 mm long, 2-6 mm wide, with (2)3-5(7) florets, lower 1(2) florets sterile, fertile florets divergent to 45°.

12-24 mm long, (8)9-12(15) mm wide, with (5)7-9(11) florets, lower (0)1(2) florets sterile, fertile florets diverging to 45°.

1.3-3 mm, (1)3-5-veined;

upper glumes 1.3-2.5 mm, 3-5-veined;

calluses glabrous;

fertile lemmas 2.9-4.5 mm, straight, 3-7-veined, keels not winged, apices scabridulous;

paleas 2.3-3 mm;

anthers 1.3-1.5 mm, the length invariant within a spikelet.

3.1-5 mm, 7-9-veined;

upper glumes 3-4.6 mm, (5)7-9-veined;

calluses glabrous;

fertile lemmas 5.5-8.5 mm, straight, 9-11-veined, keels not winged, scabridulous toward the apices;

paleas 5-7.5 mm;

anthers 1.9-2.4 mm, the length invariant within a spikelet.

1.9-2.2 mm, exposed at maturity.

2.4-3 mm, enclosed at maturity.

= 24.

= 24.