Flora of North America species comparison

30-90 cm, erect or ascending, some-what compressed;

lower internodes 1.5-2 mm thick.

10-45 cm, compressed.

conspicuously keeled, margins often with long, papillose-based hairs, particularly near the throat;

ligules 0.2-1 mm, truncate, erose;

blades 15-40 cm long, 3-7 mm wide, with prominent, white midveins, margins and/or adaxial surfaces often with basal papillose-based hairs.

6-25 cm long.

with 4-10(17) branches, often with 1 branch attached as much as 3 cm below the terminal cluster;

branches (3.5)7-16 cm long, 3-5.5 mm wide, linear.

digitate, with (1)2-3 branches;

branches 1-6(8) cm long, 5-14 mm wide, oblong.

4-7 mm long, 2-3 mm wide, with 5-7 florets, obliquely attached to the branch axes.

8-10 mm, with 5-9(11) florets.

unequal;

lower glumes 2-3 mm;

upper glumes 3-4 mm;

lemmas 4-5 mm.

1.1-2.3 mm, 1-veined;

upper glumes 2-2.9 mm;

lemmas 2.4-4 mm;

paleas with narrowly winged keels.

ovoid, rugulose and obliquely striate, usually not exposed at maturity.

= 18.

= 18.