Flora of North America species comparison

50-220 cm, erect;

nodes glabrous or pubescent.

20-60 cm, erect, base swollen, bulblike;

cataphylls pubescent;

nodes sparsely pubescent or glabrous.

glabrous or pubescent;

ligules 1-4(7.7) mm;

blades 12-60 cm long, 2-12 mm wide, flat, mostly glabrous, a few long hairs near the base of the adaxial surface.

pubescent or glabrous;

ligules 0.2-0.4 mm;

blades to 25 cm long, 1.9-6.2 mm wide, flat, glabrous, pubescent behind the ligules, margins scabrous, often ciliate basally.

terminal, with (4)10-30 racemosely arranged branches;

branches 1.2-11.5 cm, divergent;

branch axes 0.5-1.1 mm wide, winged, glabrous, margins scabrous, terminating in a spikelet.

terminal, with 2-5(8) racemosely arranged branches;

branches 0.9-4.4 cm, divergent to spreading, terminating in a spikelet;

branch axes 0.2-0.5 mm wide, narrowly winged.

1.8-2.8 mm long, 1.1-1.5 mm wide, paired, appressed to the branch axes, elliptic to slightly obovate, stramineous (rarely purple).

1.3-2 mm long, 0.7-1 mm wide, paired (rarely appearing solitary as a result of aborted spikelets), imbricate, appressed to the branch axes, elliptic.

1.2-1.7 mm, white.

1.2-1.4 mm, ellipsoid, amber.

glumes absent;

upper glumes and lower lemmas 3-veined, margins pilose;

upper florets stramineous.

glumes absent;

upper glumes and lower lemmas glabrous or sparsely and shortly pubescent basally or around the margins, 5-veined, margins entire;

lower lemmas lacking ribs over the veins;

upper florets 1.3-1.8 mm, stramineous to golden brown.

= 40.

= 40.