Flora of North America species comparison

20-110 cm, erect;

nodes glabrous.

40-100 cm, erect;

nodes 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 5-27 cm long, 1.9-8 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 2-6 racemosely arranged branches;

branches 1.5-7.5 cm, diverging to spreading;

branch axes 0.5-0.8 mm wide, narrowly winged, terminating in a spikelet.

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.

1-1.3 mm long, 0.7-0.9 mm wide, paired, appressed to the branch axes, elliptic to elliptic-obovate, glandular pubescent, stramineous to light or golden brown.

2-3 mm, white.

0.9-1.1 mm in diameter, orbicular, 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 3-veined;

upper florets 0.8-1.1 mm, stramineous.

= 20, 30, 40.

= 40.