Flora of North America species comparison

80-120 cm.

20-80 cm;

nodes often with soft, 1-2 mm hairs.

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.

9-15 cm long, 1-4 cm wide, nodding, purplish;

branches appressed or narrowly ascending;

pedicels 2-3(3.5) mm.

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

branches erect, spikelets imbricate but usually not crowded;

pedicels 1-2 mm.

7-10 mm, with 3-5 florets.

8-13 mm, with 5-11 florets.

glabrous, 1-veined;

lower glumes 3.5-4.5 mm;

upper glumes 4-5 mm;

calluses sparsely pilose;

lemmas 4-5 mm, veins pilose at least to midlength, all 3 veins excurrent as short points;

paleas 3-3.5 mm, glabrous, bases bowed-out;

anthers 1-2(2.5) 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.

2-2.5 mm.

1.5-2.3 mm.

sheaths pilose;

ligules about 0.5 mm, membranous, ciliate;

blades 2-7 mm wide, flat, both surfaces sparsely pilose basally, margins smooth or scabridulous;

upper leaves with glabrous sheaths and blades.

= unknown.

= 40.