Flora of North America species comparison

20-110 cm, erect;

nodes glabrous.

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

cataphylls pubescent;

nodes sparsely pubescent or glabrous.

glabrous or pubescent;

ligules 0.2-0.5 mm;

blades 5-31 cm long, 2-10 mm wide, flat or conduplicate, glabrous or pubescent.

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, usually composed of a digitate pair of branches, 1-3 additional branches sometimes present below the terminal pair;

branches 3-15 cm, diverging to erect;

branch axes 0.7-1.8 mm wide, narrowly winged, glabrous, margins scabrous, terminating in a spikelet, distal spikelets sometimes reduced.

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.

2.5-4 mm long, 2-2.8 mm wide, solitary, appressed to the branch axes, broadly elliptic to ovate or obovate, glabrous, light stramineous to white, apices obtuse to broadly acute.

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.

2-3 mm, white.

1.2-1.4 mm, ellipsoid, amber.

glumes absent;

upper glumes glabrous, 5-veined;

lower lemmas 5-veined, margins inrolled;

upper florets light yellow to white.

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.

= 20, 30, 40.

= 40.