Flora of North America species comparison

50-170 cm, stiffly erect.

30-100 cm;

lower nodes sometimes sparsely bearded.

rounded, glabrous except for a few hairs on either side of the collar;

ligules about 0.5 mm, membranous, ciliate;

blades 2-8 mm wide, flat or loosely infolded, glabrous, tapering to the apices.

glabrous, not or obscurely keeled;

ligules to 0.5 mm, membranous, ciliate;

blades 1-4 mm wide, folded or involute, glabrous, apices sharp.

10-30(36) cm long, 1-2 cm wide;

branches to 6 cm, erect or appressed;

pedicels 1-1.5 mm, glabrous.

8-25 cm long, 0.5-1.3 cm wide, dense;

branches appressed, lowest branches 2-6 cm;

pedicels 1-2 mm.

4-7 mm, with 5-11 florets.

4-10 mm, with 4-11 florets.

4-7 mm, always conspicuously exceeding and often twice as long as the adjacent lemmas, usually equaling or exceeding the distal florets, glabrous, 1-veined, tapering to acuminate apices;

calluses pilose;

lemmas (2)3-3.5 mm, veins pilose to well above midlength, lateral veins often excurrent;

paleas 2-3 mm, bases not bowed-out;

anthers 1-1.5 mm.

about as long as the adjacent lemmas, thin, 1-veined, acute or apiculate;

lower glumes 4-4.5 mm;

upper glumes 4-4.5 mm;

lemmas 3-4(5) mm, thin, papery, mostly white, often purple distally, glabrous or the lateral veins with a few short hairs towards the base, all veins ending before the distal margin;

paleas 3-3.5 mm, glabrous, bowed-out at the base;

anthers 1-1.5 mm.

1-1.5 mm.

1.5-1.8 mm.

= 40.

= 60, 64, 72.