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.

5-170 cm, 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 or scabrous;

ligules 2-8 mm, membranous, attenuate, becoming lacerate at maturity;

blades 3-50 cm long, 2-7 mm wide, glabrous or scabrous, those of the flag leaves sometimes exceeding the panicles.

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.

(1.5)10-105 cm long, 0.5-22 cm wide, with 3-35 racemose branches, bases of the panicles sometimes remaining enclosed in the upper leaf sheaths at maturity;

branches 1.5-20(22) cm, ascending to reflexed.

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

5-12(14) mm, with 6-20 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.

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

0.8-2.4 mm, elliptic to ovate or obovate.

glumes 1-3(4.9) mm;

upper glumes 1.8-5.5 mm;

lemmas 2-6 mm, sometimes with a dark spot near the base, apices acute to truncate, sometimes emarginate to bifid, unawned, mucronate, or awned;

paleas somewhat sericeous along the veins;

anthers 1-3, 0.2-2.7 mm.

= 40, 60, 80.

= 20.