Flora of North America species comparison

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

nodes glabrous.

(5)10-55(100) cm, erect to decumbent, usually rooting at the lower nodes;

nodes pubescent;

internodes glabrous or sparsely pubescent.

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.

hispid, margins ciliate distally;

ligules 1-1.5 mm;

blades (2)5-25 cm long, 5-18 mm wide, both surfaces usually with papillose-based hairs, rarely glabrous, bases rounded to subcordate, ciliate, with papillose-based hairs.

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.

3.5-10 cm long, 2-7 (10) cm wide, with 2-7(10) spikelike primary branches in 2 ranks;

primary branches 1-7 cm, axes about 0.9-1.2 mm wide, flat, scabrous and ciliate with papillose-based hairs;

secondary branches rarely present;

pedicels shorter than the spikelets, frequently with 1-5 long hairs.

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

solitary, appressed to the branches, in 2 rows.

2.5-4.5(5.5) mm long, about 1.5-2 mm wide, ellipsoid, solitary, in 2 rows, appressed to the branches.

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.

scarcely separated;

lower glumes 1-1.6 mm, 1/4-1/3(1/2)as long as the spikelets, 3-5-veined, clasping the base of the spikelets, glabrous;

upper glumes 3.2-4.3 (5) mm, 9-11(13)-veined, glabrous;

lower florets sterile;

lower lemmas 3.2-4.3 (5) mm long, glabrous, 5(-7)-veined;

lower paleas present;

upper lemmas 2.6-3.5 mm long, about 1.5 mm wide, apices rounded, awned, awns (0.3)0.6-1 mm;

anthers 0.8-1 mm.

1.5-2.2 mm.

2-2.5 mm.

= 36.

= 30, 36, 48.