Flora of North America species comparison

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

30-80(90) cm.

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.

dull and fibrous basally, glabrous or sparcely pilose below, hairs to 4 mm, contorted;

ligules 0.1-0.3 mm;

blades 7-31 cm long, 1.2-2.5mm wide, flat to folded, glabrous abaxially, scabridulous adaxially, margins scabrous.

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.

5-22(25) cm long, (0.6)1-11 cm wide, open to somewhat contracted, longer than wide, narrowly pyramidal, not diffuse;

lower nodes with 1-2(3) branches;

primary branches 0.6-8(11) cm, appressed or spreading to 70° from the rachis, not capillary, without spikelets on the lower 1/3, pedicels 0.8-6 mm, appressed, occasionally spreading.

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

3-6 mm, plumbeous.

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, lanceolate, membranous;

lower glumes (1.2)1.8-4.5 mm;

upper glumes 2.4-6 mm, at least 2/3 as long as the florets, occasionally 3-veined;

lemmas (2.7)3-4.3 mm, ovate, membranous, glabrous, acute;

paleas 3.1-4.5 mm, slightly longer than the lemmas, ovate, membranous, glabrous;

anthers 1.7-3 mm, yellowish to purplish.

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

1.4-2.1 mm, pyriform to globose, indurate, without a loose pericarp, smooth, shining, light brown.

= 24, 36, 54.

= 72.