Flora of North America species comparison

30-150 cm;

nodes glabrous.

80-160 cm, erect or spreading, sometimes rooting at the lowest nodes, often developing short axillary flowering shoots at most upper nodes when mature;

lower nodes glabrous or puberulent;

upper nodes glabrous.

glabrous, often purplish;

ligules absent;

blades 12-60 cm long, 10-25 mm wide, glabrous.

glabrous;

ligules absent;

blades 1-27 cm long, 0.8-30 mm wide.

10-30 cm, erect or drooping, nodes sparsely hispid, hairs papillose-based, internodes glabrous;

primary branches to 14 cm, nodes sometimes sparsely hispid, hairs papillose-based, internodes usually glabrous;

secondary branches to 3 cm.

of primary culms 7-35 cm, rachises and branches glabrous or hispid, hairs to 3 mm, papillose-based;

primary branches 2-8 cm, usually spreading and rather distant, often with secondary branches.

2.5-3.4 mm long, 1.2-1.4 mm wide, disarticulating at maturity.

2.5-5 mm, disarticulating at maturity, usually purple or streaked with purple, usually hispid, hairs papillose-based.

1.2-1.5 mm long, 1-1.3 mm wide;

embryos 50-70% as long as the caryopses.

1.2-2.5 mm, broadly obovoid or spheroid, yellowish;

embryos 1.4-2 mm, 80-91% as long as the caryopses.

glumes subequal to the spikelets;

lower florets sterile;

lower lemmas unawned or awned, awns 3-10(15) mm, curved;

lower paleas absent, vestigial, or well-developed;

upper lemmas narrowly elliptic, not or scarcely exceeding the upper glumes, acute or obtuse, with a well-differentiated, early-withering tip, glabrous or pubescent at the base of the tip, hairs not forming a line across the base;

anthers 0.5-0.7 mm.

glumes about as long as the spikelets;

lower florets sterile;

lower lemmas unawned or awned, awns to 16 mm;

lower paleas well-developed;

upper lemmas broadly obovoid or orbicular, narrowing to an acute or acuminate coriaceous portion that extends into the membranous tip, boundary between the coriaceous and membranous portions not marked by minute hairs;

anthers 0.4-1.1 mm.

= 36.

= 36.