Flora of North America species comparison

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

40-100 (120) cm tall, 2-4(5) mm thick near the base.

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 below, margins hairy, particularly distally, hairs to 3 mm, apices with conspicuous tufts of hair;

ligules 0.4-1 mm;

blades (2)4-35 cm long, 3-8 mm wide, flat to involute, glabrous on both surfaces, margins whitish, somewhat scabridulous.

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.

all terminal, (10)15-45(50) cm long, 0.2-0.8(1) cm wide, contracted, spikelike, dense, usually included in the uppermost sheath;

lower nodes with 1-2(3) branches;

primary branches 0.3-1.5 cm, appressed, spikelet-bearing to the base;

secondary branches appressed;

pulvini glabrous;

pedicels 0.2-2 mm, appressed, scabridulous.

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

1.7-3.2 mm, whitish to 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, narrowly lanceolate, membranous, prominently keeled;

lower glumes 0.7-1.7 mm, usually 1-veined, acute to acuminate;

upper glumes 2-3.2 mm, at least 2/3 as long as the florets;

lemmas 2-3.2 mm, linear-lanceolate, membranous, glabrous, acute;

paleas 1.8-3 mm, linear-lanceolate, membranous, glabrous;

anthers 3, 0.3-0.5 mm, light yellowish.

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

0.8-1.2 mm, ellipsoid, laterally flattened, light brownish or translucent.

= 24, 36, 54.

= 36.