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.

20-55 cm, erect;

nodes densely bearded;

internodes densely villous;

fall phase with spreading culms branching from the lower and midculm nodes, eventually producing flabellate clusters of reduced, flat blades, secondary panicles much 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.

3-4;

sheaths shorter than the internodes, pilose with ascending papillose-based hairs to villous;

ligules 0.5-2 mm, of hairs;

blades 4-12 cm long, 2-8 mm wide, stiffly ascending to erect, often wrinkled along the prominent veins, usually villous on both surfaces, apices involute-pointed, blades of the flag leaves much reduced.

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.

2.3-3 mm long, 1.4-1.8 mm wide, obovoid, biconvex in side view, densely pubescent, attenuate basally.

about 1.8 mm, narrowly triangular;

lower florets staminate;

upper florets mucronate.

about 1/3 as long as the spikelets, attached about 0.2 mm below the upper glumes, clasping at the base, broadly triangular, thinner than the upper glumes, weakly veined;

upper glumes with 5-9 prominent veins;

lower florets sterile;

upper florets broadly ellipsoid, apices blunt, minutely puberulent.

rosettes well-differentiated;

blades few, small, ovate to lanceolate.

rosettes poorly differentiated;

blades 2-8 cm, ovate to lanceolate, grading into the cauline blades.

panicles 3-7 cm long, 1-4 cm wide, well-exserted;

branches usually ascending, glabrous or puberulent.

= 18.

= 18.