Flora of North America species comparison

60-140 cm, erect;

nodes glabrous.

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

cataphylls pubescent;

nodes sparsely pubescent or glabrous.

pubescent;

ligules 2-4 mm;

blades to 37 cm long, 2.2-11 mm wide, flat.

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 2-5 racemosely arranged branches;

branches 3.7-13 cm, divergent to erect;

branch axes 0.2-0.8 mm wide, 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.

3.1-4 mm long, 2-2.5 mm wide, paired, not imbricate, appressed to the branch axes, elliptic to obovate, yellow-brown.

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.

present or absent;

upper glumes glabrous or sparsely pubescent basally, (6)7-veined, margins entire;

lower lemmas glabrous or sparsely pubescent basally, lacking ribs over the veins, 5-veined, margins entire;

upper florets white.

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.

2.6-2.9 mm, purple.

1.2-1.4 mm, ellipsoid, amber.

= unknown.

= 40.