Flora of North America species comparison

10-130 cm, erect, sometimes geniculate, glabrous, sometimes with a ring of glandular depressions below the nodes.

rooting at the lower nodes, erect portion 5-20 cm, glabrous, pilose, or villous, particularly below the panicles.

sometimes with glandular pits, pilose near the apices and on the collars, hairs to 4 mm, papillose-based;

ligules 0.2-0.5 mm, ciliate;

blades 5-25 cm long, 2-7(9) mm wide, flat, abaxial surfaces glabrous, adaxial surfaces scabridulous, occasionally pubescent near the base.

mostly scabrous, margins sometimes with 0.1-0.4 mm hairs;

ligules 0.1-0.6 mm;

blades 1-4 cm long, 1-4.5 mm wide, flat or conduplicate, abaxial surfaces glabrous, adaxial surfaces appressed pubescent, hairs about 0.2 mm.

(5)10-40 cm long, (2)4-18 cm wide, ovate, rachises angled and channeled;

primary branches 3-12(15) cm, solitary to whorled, appressed or diverging to 80° from the rachises;

secondary branches somewhat appressed;

pulvini glabrous;

pedicels 1-6(7) mm, almost appressed to narrowly divergent, stiff.

terminal, 1-3 cm long, 0.6-2.5 cm wide, ovate, contracted, exerted or partially included in the upper leaf sheaths, rachises somewhat viscid, pilose or glabrous;

primary branches 0.5-1.5 cm, appressed to the rachises, each terminating in a spikelet;

pulvini sparsely pilose or glabrous;

pedicels 0.2-2 mm, shorter than the spikelets, glabrous or hairy.

(4)5-10(11) mm long, 0.7-2.4 mm wide, ovate to linear-lanceolate, gray-green to purplish, with 5-11(15) florets;

disarticulation acropetal.

5-26 mm long, 1.5-4.7 mm wide, linear to ovate, greenish to stramineous, with 16-60 florets;

disarticulation in the pistillate florets basipetal, the lemmas falling separately, staminate spikelets not or tardily disarticulating.

subequal, 0.7-2(2.3) mm, ovate to lanceolate, membranous;

lemmas 1.2-2.4 mm, ovate, membranous, glabrous or with a few hairs, gray-green, lateral veins evident, often greenish, apices acute;

paleas 1-2.2 mm, hyaline, keels scabrous, apices obtuse to truncate;

anthers 3, 0.2-0.5 mm, purplish.

unequal, ovate, hyaline, glabrous or sparsely hirsute;

lower glumes 0.8-1.6 mm, 1-veined;

upper glumes 1.5-2.5 mm, 1-3-veined;

lemmas (1.5)1.8-4 mm, ovate, hyaline to membranous, lateral veins conspicuous, greenish, apices acute to acuminate, sometimes prolonged into a mucro, mucros to 0.4 mm;

paleas 0.7-3.8 mm, hyaline, about 1/2 as long as the lemmas in pistillate florets, as long as the lemmas in staminate florets, keels scabridulous;

anthers 3, 1.4-2.2 mm, reddish to yellowish.

0.5-0.8(1) mm, ovoid to rectangular-prismatic, laterally compressed, shallowly to deeply grooved on the adaxial surface, striate, reddish-brown, distal 2/3 opaque.

0.4-0.6 mm, ellipsoid, somewhat laterally compressed, smooth, light reddish-brown.

= 60.

= 60.