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.

45-110 cm, nearly erect;

nodes glabrous or the lower nodes slightly bearded;

internodes glabrous or sparsely pubescent;

fall phase branching from the mid-culm nodes, branches nearly erect, scarcely rebranching, blades and secondary panicles only slightly reduced.

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.

4-6, often with a transitional leaf above the basal rosette;

sheaths not overlapping, glabrous or softly villous basally, margins ciliate, collars pubescent;

ligules 0.4-0.7 mm, membranous, ciliate, cilia longer than the membranous portion;

blades 3.7-7 times longer than wide, 15-40 mm wide, ovate-lanceolate, glabrous or sparsely pubescent, with 11-13 major veins and 40-120 minor veins, bases cordate-clasping, with papillose-based cilia.

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.

2.9-3.9 mm long, 1.6-2 mm wide, ellipsoid, sparsely pubescent.

about 1.8 mm, narrowly triangular;

lower florets staminate;

upper florets mucronate.

1/3 – 1/2 as long as the spikelets, narrowly triangular;

upper glumes and lower lemmas slightly shorter than the spikelets, often red-tinged basally and apically;

lower florets staminate, anthers exserted prior to those of the upper florets;

upper florets pointed, apiculate, upper lemmas with a minute fringe of hairs.

rosettes well-differentiated;

blades few, small, ovate to lanceolate.

rosettes well-differentiated;

sheaths pubescent;

blades ovate to lanceolate, dark green.

panicles 7-15 cm long, 4-12 cm wide, 1.5-2 times as long as wide, with 20-80 spikelets, eventually at least partially exserted;

branches stiff, ascending to spreading.

= 18.

= 18, 36.