Flora of North America species comparison

(10) 30-110 cm, round or basally compressed, tillering from the basal nodes, not branching from the aerial nodes, mostly glabrous, sometimes pilose basally;

internodes solid.

(3)10-60 cm, prostrate or erect, round or somewhat compressed, often highly branched;

internodes hollow.

sometimes with a pilose collar;

ligules 1-2 mm, truncate, erose;

blades (2)8-35 cm long, 2-8 mm wide, glabrous, strigose, or pilose.

glabrous (rarely sparsely pilose near the base), sometimes with a sticky exudate;

ligules 1.2-2.5 mm, truncate, erose to lacerate;

blades 1-15 cm long, 1.2-5.5 mm wide, glabrous abaxially and adaxially.

8-20 cm, with 2-15 subdigitate or racemose branches;

secondary panicles often hidden in the lowest leaf sheaths;

branches 2-19 cm, ascending to spreading at maturity.

2-17 cm, with 5-23 racemose branches;

branches 1-2.5(3.5) cm, stiff, often included in the upper leaf sheaths.

4-12 mm, light brown to dark olive green, with 4-13 florets, often widely diverging at anthesis.

4.5-7.5 mm, more or less imbricate, magenta or green, with 2-6 florets.

narrowly triangular to ovate, acute;

lower glumes 2.3-4.8 mm;

upper glumes 3.3-6 mm;

lemmas 3.5-5 mm, membranous, ovate to obovate, lateral veins glabrous or sericeous, hairs often restricted to the basal portion, sometimes also sericeous on the midvein and between the veins, apices obtuse to truncate, usually emarginate, unawned, sometimes mucronate;

paleas ciliate on the margins;

anthers 3, 0.3-1.6 mm.

triangular, acute;

lower glumes 1.6-2 mm, acute;

upper glumes 2-2.9 mm;

lemmas 2.4-3.5 mm, ovate, membranous, sericeous along the lower veins, lateral veins pronounced, apices acute, obtuse, or truncate, awned, awns 0.5-1.5 mm;

paleas minutely scabrous along the veins;

anthers 3, 0.4-0.5 mm.

1.5-2.3 mm long, 0.9-1 mm wide, strongly dorsally compressed.

1.2-1.6 mm long, 0.4-0.5 mm wide, narrowly elliptic to obovate, transversely elliptic in cross section.

= 40, 60, 80.

= 40.