Flora of North America species comparison

50-170 cm, stiffly erect.

60-125 cm.

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.

rounded or the basal sheaths keeled, glabrous, except for a few hairs on either side of the collar;

ligules 1-2 mm, membranous, ciliate;

blades 2-5 mm wide, elongate, usually involute distally.

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

branches to 6 cm, erect or appressed;

pedicels 1-1.5 mm, glabrous.

8-16(20) cm long, 1.5-4 cm wide, not dense;

branches to 8(10) cm, erect to divergent, stiff;

pedicels shorter than 1 mm.

4-7 mm, with 5-11 florets.

4-6 mm long, pale to dark purple, with 4-6 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.

1-veined;

lower glumes 4-4.5 mm;

upper glumes about 5 mm;

lemmas 3-4 mm, veins pubescent to midlength or beyond, midveins excurrent, lateral veins often excurrent;

paleas 3-3.5 mm, veins ciliolate, bases bowed-out;

anthers 1-1.5 mm.

1-1.5 mm.

1.5-1.8 mm.

= 40.

= 40.