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.

5-45 cm tall, 0.2-0.8 mm thick, erect, often purplish;

nodes glabrous or sparsely pubescent;

internodes often ascending-pubescent below;

fall phase branching extensively from the basal nodes, usually forming very dense cushions.

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.

3-5;

sheaths mostly shorter than the internodes, often purplish, glabrous or sparsely pubescent, margins often sparsely ciliate;

ligules 0.2-0.5 mm, of hairs, without adjacent pseudoligules;

blades 2-5 cm long (rarely longer), 1-4 mm wide, flat or involute, rather firm, ascending, often purplish, usually glabrous on both surfaces, bases subcordate, often with a few long, stiff cilia, margins narrowly white, cartilaginous, and scabridulous, blades of the flag leaves only slightly shorter than those of the lower leaves.

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.

1.1-1.5 mm long, 0.7-1 mm wide, broadly ellipsoid or obovoid, often purple-tinged, glabrous or puberulent, obtuse or subacute.

about 1.8 mm, narrowly triangular;

lower florets staminate;

upper florets mucronate.

approximately 1/3 as long as the spikelets, broadly acute or obtuse;

upper glumes and lower lemmas subequal or the glumes slightly shorter than the lemmas;

lower florets sterile;

upper florets 0.9-1.2 mm, ellipsoid, apices exceeding the upper glumes and lower lemmas, subacute.

rosettes well-differentiated;

blades few, small, ovate to lanceolate.

rosettes well-differentiated;

blades 1-5 cm, ovate to lanceolate.

panicles 1.5-5 cm (seldom longer), nearly as wide as long, delicate, dense;

branches numerous, flexuous, spreading, often purplish, glabrous or faintly scabridulous.

= 18.