Flora of North America species comparison

(10)30-50(70) cm, glabrous, smooth.

(15)20-40(45) cm, glabrous, smooth.

closed for about 1/2 their length, glabrous, smooth or scabrous distally, persistent;

collars glabrous;

ligules shorter than 0.3 mm;

blades 0.3-0.7(1.2) mm in diameter, conduplicate, abaxial surfaces smooth or scabrous, adaxial surfaces scabrous, veins 5-7(9), ribs 1-3, indistinct;

abaxial sclerenchyma usually a continuous band;

adaxial sclerenchyma absent.

closed for about 1/2 their length, glabrous, shredding into fibers, sometimes slowly;

collars glabrous;

ligules 0.1-0.5(1) mm;

blades to 3 mm wide when flat, 0.5-1 (1.5) mm in diameter when conduplicate, veins (3)5, ribs (1)3(5), abaxial surfaces smooth or slightly scabrous, adaxial surfaces sparsely scabrous;

abaxial sclerenchyma in 3-5 narrow strands less than twice as wide as high;

adaxial sclerenchyma absent.

(2)5-10(12) cm, contracted, with 1-2(3) branches per node;

branches usually erect, sometimes spreading at anthesis, lower branches with 2+ spikelets.

3-5(8) cm, contracted, with 1-3 branches per node;

branches stiff, erect, scabrous, lower branches with 2+ spikelets.

4-6(7.3) mm, with 3-6(8) florets.

(4.5)5-6.5(7) mm, with 2-5 florets.

exceeded by the upper florets, lanceolate to ovate-lanceolate, mostly smooth and glabrous, sometimes scabrous distally;

lower glumes 1-2(3) mm;

upper glumes (2.2)2.6-4(4.6) mm;

lemmas (2.6)3-4(5) mm, ovate-lanceolate, mostly smooth, sometimes scabrous or hispid near the apices, awns 0.5-2 mm, terminal, sometimes absent;

paleas about equal to the lemmas, intercostal region puberulent distally;

anthers (1.4)2-2.6 mm;

ovary apices glabrous.

exceeded by the upper florets, lanceolate to ovate-lanceolate, mostly smooth, sometimes scabrous distally;

lower glumes 1.5-3 mm;

upper glumes 2.5-3.8 mm;

lemmas 3-4.5 mm, glabrous or puberulent near the apices, awns (0.3)1-1.5 mm, terminal;

paleas as long as or slightly shorter than the lemmas, intercostal region puberulent distally;

anthers 0.6-0.9(1.4) mm;

ovary apices densely and conspicuously pubescent.

= 14, 28.

= unknown.