Flora of North America species comparison

30-100 cm;

lower nodes sometimes sparsely bearded.

20-80 cm;

nodes often with soft, 1-2 mm hairs.

glabrous, not or obscurely keeled;

ligules to 0.5 mm, membranous, ciliate;

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

rounded, lower sheaths often strigose or pilose, upper sheaths glabrous or scabrous;

ligules 0.5-1 mm, membranous, ciliate;

blades 1-4 mm wide, usually involute or loosely infolded, glabrous, scabrous, or sparsely pilose, attenuate distally.

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

branches appressed, lowest branches 2-6 cm;

pedicels 1-2 mm.

7-20(25) cm long, 0.3-0.8 cm wide;

branches erect, spikelets imbricate but usually not crowded;

pedicels 1-2 mm.

4-10 mm, with 4-11 florets.

8-13 mm, with 5-11 florets.

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.

glabrous, usually purple-tinged;

lower glumes 3-8(10) mm, 1-3-veined;

upper glumes 4-10 mm, 1-7-veined;

lemmas 3.5-7 mm, usually purple-tinged, midveins pilose on the basal 1/3 - 1/2, rarely excurrent, lateral veins pilose to well above midlength, never excurrent;

paleas 1-2 mm shorter than the lemmas, margins pubescent;

anthers 1-1.5 mm.

1.5-1.8 mm.

1.5-2.3 mm.

= 60, 64, 72.

= 40.