Flora of North America species comparison

50-120 cm, glabrous.

(15)22-35(50) cm, erect, glabrous, smooth.

closed for less than 1/3 their length, glabrous, shredding into fibers;

Iigules (0.2)0.5-1.5 mm;

blades 2-8 mm wide, flat or loosely convolute, smooth or scabrous, veins 9-35, ribs obscure;

abaxial sclerenchyma in narrow strands;

adaxial sclerenchyma developed;

girders or pillars usually associated with the major veins.

closed for about 1/2 their length, pubescent or glabrous, persistent;

collars glabrous;

ligules 0.1-0.4 mm;

blades 0.6-1 mm in diameter, conduplicate, veins 5-7, ribs 1-3(5), indistinct;

abaxial sclerenchyma forming continuous or interrupted bands;

adaxial sclerenchyma absent.

(5)10-20 cm, open, with 1-2 branches per node;

branches lax, ascending to spreading, spikelets clustered towards the ends of the branches, closely imbricate.

2.5-9(11) cm, compact, erect, with 1-2 branches per node;

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

4-7(7.5) mm, elliptic to obovate, with 3-5(8) florets.

5.5-9(11) mm, with 3-6(7) florets.

lanceolate to ovate-lanceolate, scabrous at least on the veins;

lower glumes (2.5)3-4(5) mm, usually almost as long as the adjacent lemmas;

upper glumes (3.5)4-5(5.5) mm;

lemmas 4-5(5.2) mm, stiffly chartaceous, ovate to obovate, glabrous, somewhat acute, unawned;

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

anthers (0.7)1-2(2.5) mm;

ovary apices pubescent.

exceeded by the upper florets, ovate-lanceolate to ovate, glabrous or pubescent distally;

lower glumes (1.8)2-3(4) mm;

upper glumes 2.8-4(5.1) mm;

lemmas (3.5)4-6(6.2) mm, lanceolate to ovate-lanceolate, smooth or scabrous near the apices, sometimes pubescent distally, awns (0.6)1-1.5(2) mm, terminal;

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

anthers (1.8)2-3 mm;

ovary apices glabrous.

= unknown.

= 42 [in European literature for the horticultural forms].