Flora of North America species comparison

24-80 cm, glabrous or puberulent;

nodes sparsely, spreading-pilose;

internodes mostly elongated, glabrous or puberulent;

fall phase with a few suberect branches from the lower and midculm nodes, blades slightly reduced, secondary panicles partially exserted.

50-150 cm, usually robust, erect;

nodes often swollen, densely bearded with thin retrorse hairs above a constricted, glabrous, viscid ring;

internodes grayish-purple, velvety-pubescent;

fall phase branching from the mid- and upper culm nodes, with long, repeatedly forking and often recurving branches, ultimately with fascicles of reduced blades and included secondary panicles.

3-4;

sheaths not overlapping, with ascending papillose-based hairs;

ligules 0.3-0.5 mm, membranous, ciliate, cilia longer than the membranous portion;

blades 5-15 cm long, 7-13 mm wide, ascending to erect, sparsely to densely pubescent with papillose-based hairs, with 9-11 prominent major veins and 25-50 minor veins, bases truncate to cordate, margins with papillose-based cilia.

7-11;

sheaths not overlapping, narrowing distally, lustrous, bases sparsely to densely retrorsely villous, hairs papillose-based, summits purplish, with yellowish spots;

collars densely villous;

ligules 0.5-2 mm, of hairs;

blades 9-20 cm long, 9-20 mm wide, thick, densely soft pubescent, bases rounded to subcordate, margins ciliate basally.

6-10 cm long, 3-5 cm wide, their length usually less than twice their width, eventually well-exserted, with 20-40 spikelets;

branches spreading to ascending.

3.3-3.8 mm long, 1.6-2 mm wide, ellipsoid-obovoid, turgid, pubescent, hairs papillose-based, apices rounded.

2.2-2.8 mm long, 1.3-1.5 mm wide, ovoid-ellipsoid, often purplish basally, prominently veined, margins and apices sparsely to densely pubescent, hairs papillose-based.

about 1.8 mm, narrowly triangular;

lower florets staminate;

upper florets mucronate.

0.6-1.3 mm, subtruncate to acuminate;

lower florets sterile;

upper florets minutely apiculate.

rosettes well-differentiated;

blades few, small, ovate to lanceolate.

rosettes well-differentiated;

blades sometimes more than 10 cm, lanceolate.

panicles 6-16 cm long, 5-12 cm wide, well-exserted, dense;

rachises softly pubescent basally;

branches often mottled with purplish viscid spots, glabrous.

= 18.

= 18.