Flora of North America species comparison

7-35(60) cm, erect or decumbent.

20-70 cm, erect to decumbent, glabrous or scurfy roughened below.

rounded below, margins and apices hairy, hairs to 3 mm;

ligules 0.3-1 mm;

blades 2-12(20) cm long, 2-6 mm wide, flat, abaxial surface glabrous, adaxial surface scabridulous, sometimes sparsely hispid, margins ciliate-pectinate.

rounded basally, apices glabrous or with scattered, appressed, papillose-based hairs, hairs to 4 mm;

ligules 0.2-0.6 mm;

blades 2.5-13(18) cm long, 1-4.2 mm wide, flat to involute, glabrous abaxially, scabrous adaxially, margins scabridulous, often also with a few papillose-based hairs;

flag blades ascending.

4-15(18) cm long, 0.3-6 cm wide, open (contracted when immature), pyramidal;

lower nodes with 7-12(15) branches;

primary branches 0.5-4.5 cm, spreading 30-90° from the rachis, with elongated glands, without spikelets on the lower 1/3 – 1/2, secondary branches appressed;

pedicels 0.1-0.5 mm, appressed.

10-35 cm long, 4.5-30 cm wide, open, diffuse, subpyramidal, about as long as wide, partially included in the uppermost leaf sheath;

lower nodes with 1-2 branches;

primary branches 4-14 cm, capillary, spreading 10-80° from the rachis;

secondary branches spreading, without spikelets on the lower 1/3 - 1/2;

pedicels 6-25 mm, spreading.

1.2-1.8 mm, plumbeous or brownish, often secund along the branch.

2.3-3 mm, purplish-tinged.

unequal, ovate to obovate, membranous;

lower glumes 0.3-0.7 mm, without midveins;

upper glumes 1.2-1.8 mm, at least 2/3 as long as the florets, often longer;

lemmas 1.2-1.7 mm, ovate to elliptic, membranous, glabrous, acute;

paleas 1.1-1.6 mm, ovate to elliptic, membranous, glabrous;

anthers 0.2-0.4 mm, yellowish or purplish.

unequal, linear-lanceolate to lanceolate, membranous;

lower glumes 0.5-1.7 mm, often without midveins;

upper glumes 1.7-3 mm, at least 2/3 as long as the florets, often longer;

lemmas 1.8-3 mm, lanceolate to ovate, membranous, glabrous, acute;

paleas 1.7-2.9 mm, ovate, membranous, glabrous, often splitting as the fruit matures;

anthers 0.3-1 mm, yellowish.

0.6-1 mm, obovoid, faintly striate, light brownish.

1.1-1.5 mm, obovoid, light brown, translucent, occasionally rugulose.

= 24, 36, 54.

= unknown.