Flora of North America species comparison

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

40-100 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.

keeled and flattened below, margins occasionally hairy distally, hairs to 1.2 mm;

ligules 0.2-0.4 mm;

blades 12-35 cm long, 4-12 mm wide, flat, glabrous abaxially, scabridulous adaxially, margins smooth or 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.

15-50 cm long, 7-22(30) cm wide, diffuse, ovate;

primary branches 2-17 cm, spreading 40-100° from the rachis;

secondary branches appressed to loosely spreading, without spikelets on the lower 1/4 - 1/2;

pulvini glabrous;

pedicels 0.2-1.2 mm, appressed, scabridulous.

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

1-2 mm, purplish to brownish.

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 to lanceolate, membranous, prominently keeled;

lower glumes 0.6-1 mm;

upper glumes 1.1-1.8 mm, slightly shorter than or subequal to the lemmas;

lemmas 1.2-2 mm, lanceolate, membranous, glabrous, acute;

paleas 1.2-2 mm, ovate, membranous, glabrous, often splitting in two between the veins at maturity;

anthers 0.2-0.4 mm, purplish.

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

0.6-1 mm, ovoid, slightly flattened, reddish-brown.

= 24, 36, 54.

= 40.