Flora of North America species comparison

30-80 cm, erect or geniculate at the base, usually with 2 nodes.

(10)30-120 cm.

mostly basal, sometimes forming a basal tuft;

sheaths smooth, glabrous;

ligules 1.5-3.6 mm, rounded to acute;

blades 12-25 cm long, strongly rolled, 0.3-0.5 mm in diameter, abaxial surfaces smooth or scabridulous, glabrous or hairy, often scabridulous or hairy proximally and essentially smooth and glabrous distally, adaxial surfaces scabrous, flag leaf blades 5-8 cm.

sometimes forming a basal tuft;

sheaths glabrous;

ligules 2.5-8(9) mm, acute to acuminate;

blades 7-30 cm long, 0.2-2 mm wide, usually involute.

5-15 cm long, (2)4-12 cm wide, narrow to open, often nodding;

branches ascending to spreading, flexuous, smooth or scabridulous.

5-30(35) cm long, 0.5-1.5(2) cm wide, erect or nodding;

branches erect to ascending.

4-7 mm, ovate or U-shaped.

3-6.7 mm, bisexual, narrowly V-shaped, appressed to the branches.

exceeded by or subequal to the adjacent florets, 1-veined, acute;

lower glumes 2.7-4.5 mm;

upper glumes 3.5-5 mm;

callus hairs to 1 mm;

lemmas 3.3-5 mm, scabridulous or puberulent, hairs to 0.1 mm, apices acute, erose to 4-toothed, awns 3.7-7 mm, attached near the base of the lemma, strongly geniculate, geniculation below the lemma apices, distal segment 2.5-4.5 mm, pale;

anthers 2-3 mm.

equaling or exceeding the florets, narrowly lanceolate, usually pale green, sometimes purple-tipped, 3-veined, acuminate;

lower glumes (3)3.2-5.5(6.7) mm;

upper glumes (3)3.1-5.4(6) mm;

callus hairs 0.3-1.15 mm;

lemmas 1.7-4.3 mm, smooth, shiny, glabrous, apices weakly toothed or erose, awns 1.5-5.5(6) mm, straight to slightly geniculate, attached from slightly below to slightly above the middle of the lemma, exceeding the florets by 1-2.5 mm;

anthers 0.3-0.5(0.7) mm.

= 14, 26, 28, 32, 42.

= 26.