Flora of North America species comparison

25-100 cm, decumbent, rooting at the lower nodes;

nodes glabrous.

10-70 cm, decumbent, branching and rooting at the lower nodes;

nodes glabrous;

internodes glabrous or sparsely pilose distally.

glabrous or sparsely pilose;

ligules 0.5-1 mm;

blades 2.5-17.5 cm long, 3-13 mm wide, glabrous or sparsely pilose, bases subcordate, not clasping the stems, margins ciliate basally, with papillose-based hairs.

mostly pubescent or glabrous, margins ciliate;

ligules 0.5-1.3 mm;

blades 2-15(27) cm long, 3-10 (12) mm wide, glabrous or pubescent;

margins scabrous, sometimes ciliate basally;

bases subcordate, not clasping the stems.

6-16 cm long, 2-2.5 cm wide, with 2-8 spikelike primary branches in 2 ranks;

primary branches 3-8 cm, axils pubescent, axes 1.3-2.5 mm wide, flat, usually glabrous, occasionally pilose dorsally;

secondary branches rarely present;

pedicels shorter than the spikelets, scabrous and sparsely pilose.

2.5-13(22) cm, with 3-6(9) spikelike primary branches in 2 ranks;

primary branches 2-7 cm, ascending to reflexed, axes 0.7-1.2 mm wide, flat and narrowly winged, margins scabrous;

secondary branches absent;

pedicels shorter than the spikelets, scabrous.

3.8-5 mm long, 2-2.5 mm wide, ovoid, bi-convex;

solitary, appressed to the branches, in 2 rows.

3.3-3.8 mm long, 1-1.4 mm wide, solitary, appressed to the branches, in 2 rows.

scarcely separated;

lower glumes 1.2-1.8 mm, to 1/3 as long as the spikelets, obtuse, glabrous, 5(-7)-veined, not clasping the base of the spikelets;

upper glumes 3.2-4.7 mm, glabrous, 7(-9)-veined;

lower florets sterile;

lower lemmas 3.2-4.7 mm, glabrous, 5-veined;

lower paleas present;

upper lemmas 2.8-3.4 mm long, 1.8-2.3 mm wide, apices incurved, broadly acute to rounded, mucronulate;

anthers about 1 mm.

separated by 0.3-0.5 mm;

lower glumes 1.4-1.7 mm, 1/3 – 1/2 as long as the spikelets, 9-11-veined, glabrous;

upper glumes 2.7-3.4 mm, glabrous, 7-9-veined;

lower florets sterile;

lower lemmas 2.7-3.4 mm, glabrous, 5-veined, without evident cross venation;

lower paleas present;

upper lemmas 2.6-3.4 mm, apices rounded to acute, mucronate;

anthers 1.1-1.35 mm.

1.5-2.2 mm.

1.6-2.5 mm.

= 36.

= 36, 54, 72, 84.