Flora of North America species comparison

5-90 cm, erect, slender, puberulent below the panicle.

50-135 cm, erect or ascending, sometimes geniculate, usually single or few together, sometimes clumped;

nodes 2-7, pubescent or glabrous;

internodes glabrous or pubescent.

usually densely and softly retrorsely pubescent to pilose, upper sheaths sometimes glabrous;

auricles absent;

ligules 2-3 mm, glabrous, obtuse, lacerate;

blades to 16 cm long, 1-6 mm wide, both surfaces softly hairy.

pilose, villous, or glabrous;

auricles sometimes present on the lower leaves;

ligules to 4 mm, glabrous, truncate or obtuse, erose;

blades 7-30 cm long, 2.5-8.5(9) mm wide, flat, pubescent or glabrous on both surfaces, sometimes only the adaxial surface pubescent.

5-20 cm long, 3-8 cm wide, open, lax, drooping distally, usually 1-sided;

branches 1-4 cm, drooping, usually 1-sided and longer than the spikelets, usually at least 1 branch with 4-8 spikelets.

10-24 cm, open or contracted, erect or nodding;

branches erect to spreading.

10-20 mm, usually shorter than the panicle branches, sides parallel or diverging distally, moderately laterally compressed, often purplish-tinged, not densely crowded, with 4-8 florets.

16-32(45) mm, elliptic to lanceolate, terete to moderately laterally compressed, sometimes purplish, with 4-14 florets.

villous, pubescent, or glabrous, margins hyaline;

lower glumes 4-9 mm, 1-veined;

upper glumes 7-13 mm, 3-5-veined;

lemmas 9-12 mm, lanceolate, glabrous or pubescent to pilose, 5-7-veined, rounded over the midvein, margins hyaline, often with some hairs longer than those on the backs, apices acuminate, hyaline, bifid, teeth 0.8-2(3) mm;

awns 10-18 mm, straight, arising 1.5 mm or more below the lemma apices;

anthers 0.5-1 mm.

glabrous or hairy;

lower glumes (4)5-10 mm, 1(3)-veined;

upper glumes (5)7.5-13 mm, 3-veined;

lemmas 9-16 mm, lanceolate, rounded over the midvein, sparsely to densely hairy throughout, or on the margins and lower portion of the back, or along the marginal veins and keel, apices subulate to acute, entire or slightly emarginate, lobes shorter than 1 mm;

awns usually present, sometimes absent, to 7.5 mm, straight, arising less than 1.5 mm below the lemma apices;

anthers 3.5-7 mm.

= 14.

= 28, 56.