Flora of North America species comparison

(10) 25-60(100) cm, erect, simple or sparingly branched.

(4)60-90 cm.

scabrous to scabridulous;

ligules 1.5-4(6) mm, rounded to truncate;

blades 20-40 cm long, (3)5-15 mm wide, flat, rather stiffly erect, narrowing to the base, glabrous, often glaucous, veins widely spaced, cross venation evident on the abaxial surfaces;

flag leaf blades 3.5-10 cm.

(3) 4-14 cm, the spikelets congested;

lowermost branches 10-25 mm;

pedicels 0.5-1 mm, pubescent.

8-13 cm long, (1)2-6 cm wide, diffuse, with slender, often drooping branches and 3+ spikelets per branch.

6-10 mm;

lower glumes 3-4 mm;

upper glumes 8-10 mm;

sterile florets 3-4 mm, awn of the first floret 2-4 mm, awn of the second floret 4-9 mm, equaling or only slightly exceeding the upper glumes;

bisexual florets 1-2.5 mm;

anthers 2, (2.9)3.5-4.8(5.5) mm.

4.5-6 mm, tawny or green to olive-green, sometimes infused with purple;

rachilla internodes 0.2-0.5 mm, glabrous.

subequal, equaling or slightly exceeded by the apices of the bisexual florets;

lower glumes 4.5-5 mm long, 0.7-1 mm wide;

upper glumes 3.5-5.2 mm long, 1-1.8 mm wide;

lowest 2 florets staminate;

lemmas usually mostly glabrous on the body, sometimes scattered-pubescent, scabridulous near the apices, margins usually pilose, apices rounded and shallowly bilobed, unawned or awned, awns to 1 mm;

first lemma 4-5 mm long, 0.75-1 mm wide, length more than 5 times width, narrowly elliptic;

bisexual lemmas 3.5-4.5 mm, margins pilose, particularly distally;

anthers 2-3.5 mm.

0.5-1 mm, pilose-ciliate, sometimes absent;

ligules 2-7 mm, truncate;

blades 1-31 cm long, 3-10 mm wide.

= 10,20.

= 42.