Flora of North America species comparison

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

15-60(70) cm, erect to decumbent, wiry.

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.

often inflated, sometimes with sparse hairs basally, hairs papillose-based, glabrous or the apices with small tufts of hairs, hairs to 3 mm;

ligules 0.1-0.3 mm;

blades 2-12(25) cm long, 0.6-2 mm wide, flat to loosely involute, glabrous abaxially, scabridulous adaxially, bases of both surfaces sometimes with a few papillose-based hairs, 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.

terminal and axillary, 1-5 cm long, 0.2-0.5 cm wide, contracted, cylindrical, enclosed in the uppermost sheath;

lower nodes with 1-2(3) branches;

primary branches 0.4-1.8 cm, appressed, spikelet-bearing to the base;

secondary branches appressed;

pedicels 0.2-4 mm, appressed, scabridulous.

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

2.3-6 mm, yellowish to purplish- or grayish-mottled.

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.

subequal, linear-lanceolate to lanceolate-triangular or ovate, membranous to chartaceous, glabrous;

lower glumes (2.2)2.8-4.7 mm;

upper glumes (2.4)3-5 mm;

lemmas (2.1)3-5.4 mm, lanceolate to lanceolate-triangular, 1-3-veined, chartaceous, often mottled with purplish or grayish areas, strigose, hairs less than 0.5 mm, apices acuminate or acute;

paleas (2.1)3-6 mm, as long as or longer than the lemmas, sometimes tapering into a beak, lanceolate to lanceolate-triangular, chartaceous, strigose;

anthers 3, 1.2-3.2 mm, yellowish or purplish.

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

(1.1)1.8-2.7 mm, obovoid, laterally flattened, light brownish, translucent.

= 24, 36, 54.

= 54.