Flora of North America species comparison

40-120 cm, erect or ascending.

90-150 cm, erect;

nodes 1-2(3), pubescent or puberulent;

internodes usually puberulent, occasionally glabrous, pilose to densely pubescent below the nodes.

densely pubescent to pilose, hairs to 1 mm, collars pilose, hairs to 2 mm;

auricles absent;

ligules 0.5-2.5 mm long, sparsely to densely pubescent, obtuse, erose;

blades 7.5-16.5 cm long, 3-12 mm wide, flat, densely pubescent on both surfaces.

7-16 cm long, 3-6 cm wide, open, erect to ascending;

branches sometimes longer than the spikelets, slender, ascending to spreading.

5-16 cm, open;

branches erect, ascending and appressed to slightly spreading.

14-18(30) mm, oblong-lanceolate, terete to moderately laterally compressed, not purple-tinged;

florets 4-9(11), bases concealed or visible at maturity;

rachilla internodes 1.5-2 mm, concealed or visible at maturity.

25-35(45) mm, terete to moderately laterally compressed, with 3-7 florets.

usually glabrous, sometimes scabrous or pubescent;

lower glumes 5-7 mm, 5-veined;

upper glumes 6-9 mm, 7(9)-veined;

lemmas 8-11.5 mm long, 1.7-2.6 mm wide, elliptic to lanceolate, coriaceous, backs usually glabrous, distinctly 7(9)-veined, not ribbed, rounded over the midvein, margins scabrous or pubescent, bluntly angled, inrolled or not at maturity, apices acute to obtuse, bifid, teeth shorter than 1 mm;

awns 3-10 mm, straight, arising less than 1.5 mm below the lemma apices, awn of the lowest lemma shorter than the others;

anthers 0.7-1.7 mm.

sparsely to densely pubescent;

lower glumes 5-8(9) mm, 1(3)-veined;

upper glumes (7)8-9 mm, 3-veined, sometimes mucronate;

lemmas 10-14 mm, elliptic, rounded over the midvein, backs sparsely to densely pubescent, margins pubescent, apices entire;

awns 3.5-7 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 3-6 mm.

equaling or shorter than the paleas, weakly to strongly inrolled.

sheaths densely hairy, hairs stiff, often retrorse;

upper sheaths pubescent or glabrous;

ligules 1-2.5 mm, glabrous or pilose, obtuse, ciliolate;

blades 9-18 cm long, 2-4 mm wide, pilose on both surfaces.

= 14, 28, 56.

= unknown.