Flora of North America species comparison

10-79 cm, erect;

nodes glabrous.

30-100 cm, strongly decumbent, upright portion usually not standing more than 20 cm tall, much branched;

nodes glabrous.

glabrous, sparsely long pubescent distally;

ligules 1-2 mm;

blades 10-19 cm long, 1.4-8 mm wide, flat or conduplicate, glabrous or pubescent, apices involute.

glabrous;

ligules 1-2.4 mm;

blades to 7 cm long, 3-6.5 mm wide, flat.

terminal, usually composed of a digitate pair of branches, a third branch sometimes present below;

branches 1.1-7.9 cm, diverging to erect;

branch axes 0.4-1.4 mm wide, winged, glabrous, margins scabrous, terminating in a spikelet.

terminal, with 2-5 racemosely arranged branches;

branches 2-6 cm, diverging, persistent;

branch axes 2-3.3 mm wide, broadly winged, glabrous, margins scabrous, terminating in a spikelet.

3-4.5 mm long, 1.1-2 mm wide, solitary, appressed to the branch axes, elliptic-lanceolate, glabrous, light stramineous, apices acute to acuminate.

3.2-4 mm long, 1.6-1.7 mm wide, solitary, appressed to the branch axes, elliptic, abruptly pointed, stramineous.

absent (rarely present);

upper glumes and lower lemmas glabrous, 3-veined;

upper florets white.

absent;

upper glumes and lower lemmas glabrous, 5-veined;

upper florets stramineous, lemmas with a few minute hairs at the apices.

2.8-3.1 mm, yellow.

2-3 mm, white.

= 20, 40, 60.

= 40.