Flora of North America species comparison

to 5 m long, long-decumbent and rooting at the lower nodes, vertical portion 90-200(300) cm;

nodes villous.

10-35 cm, prostrate to decumbent;

nodes glabrous or sparsely puberulent.

glabrous or sparsely pubscent, margins densely ciliate;

ligules 0.5-1 mm;

blades 2-6 cm long, 4-15 mm wide, adaxial surfaces glabrous or sparsely pubescent with papillose-based hairs, margins ciliate basally.

10-25 cm long, 5-10 cm wide, pyramidal, with 10-30 spikelike branches in more than 2 ranks;

primary branches 2.5-8 cm long, 0.4-0.9 mm wide, ascending to divergent, axils pubescent, axes flat, glabrous or with a few papillose-based hairs, secondary branches present or absent;

pedicels shorter than the spikelets, scabrous, sometimes with hairs.

1.5-6(8) cm long, 4-5 cm wide, ovoid, with 3-16 spikelike branches in more than 2 ranks;

primary branches 1-4 cm long, 0.2-0.5 mm wide, flat, scabrous;

secondary branches occasionally present;

pedicels shorter than the spikelets, scabrous, glabrous or with long hairs distally.

2.6-3.5 mm long, 1-1.4 mm wide, mostly in pairs, in 2-4 rows, appressed to the branches, purplish to green.

1.8-2.2 mm long, 0.8-1 mm wide, mostly in pairs, in 2-4 rows, appressed to the branches.

scarcely separate, rachilla internodes short not pronounced;

lower glumes 0.6-1.1 mm, 1/5 – 1/3 as long as the spikelets, glabrous, 0-1(3)-veined;

upper glumes 2.6-3.5 mm, glabrous, 5-(7)-veined, without cross venation;

lower florets staminate;

lower lemmas 2.6-3.3 mm, glabrous, 5-veined, without cross venation;

upper lemmas 2.3-2.8 mm long, 1-1.3 mm wide, apices rounded, mucronate;

anthers 1-1.5 mm.

scarcely separate, rachilla internodes short, not pronounced;

lower glumes 0.2-0.6 mm, 1/5 – 1/4 as long as the spikelets, 0-1-veined;

upper glumes 1.7-2.1 mm, glabrous, 7-veined, without cross venation;

lower florets sterile or staminate;

lower lemmas 1.7-2.1 mm, glabrous, 5-veined, without cross venation;

lower paleas present;

upper lemmas 1.5-1.8 mm long, 0.8-1 mm wide, apices rounded, mucronate, mucros to about 0.1 mm;

anthers 0.4-0.6 mm.

1.8-2 mm.

0.8-1.2 mm.

sheaths with papillose-based hairs, these more dense distally, margins ciliate;

collars pubescent;

ligules 1-1.5 mm;

blades 7.5-35 cm long, 4-20 mm wide, glabrous or sparsely pilose on both surfaces, margins scabrous.

= 18, 36.

= 14(18).