Flora of North America species comparison

10-120 cm, clumped, erect, usually glabrous, sometimes villous, sometimes scabridulous.

80-110 cm, solitary, decumbent, often anthocyanic at the base, glabrous.

mostly basal or evenly distributed;

sheaths variously pubescent or glabrous;

ligules 0.5-4 mm, truncate or rounded;

blades (3)10-20(40) cm long, 1-5 mm wide, flat, folded, or involute, erect and stiff or ascending and lax.

evenly distributed;

sheaths usually glabrous;

ligules 3-5 mm, truncate or rounded, erose;

blades 8-20 cm long, 3-7 mm wide, flat, lax, scabrous.

(5)20-30(50) cm long, (0.5)1-2.5(5) cm wide, spikelike to open, often interrupted basally, green, purplish, or tawny, usually silvery-shiny;

branches with the spikelets evenly distributed.

13-20 cm, narrow, moderately dense, nodding, pale green, slightly tinged with purple;

branches loosely ascending, naked below for 1-2 cm, the spikelets closely and evenly distributed distally.

5-7.5 mm, sessile, subsessile, or on pedicels to 1.5(3.5) mm, with 2(3) florets;

rachilla internodes 0.5-1.5 mm;

rachilla hairs to 1 mm.

7-9 mm, subsessile or on pedicels to 1 cm, oblong-ovate, with 2-3(4) florets;

rachilla internodes to 2 mm;

rachilla hairs about 1 mm.

subequal to unequal, lanceolate, usually smooth, sometimes sparsely scabrous, sometimes pilose, with wide scarious margins, apices acute to acuminate, sometimes apiculate;

lower glumes 3-4(5.5) mm;

upper glumes 4-7 mm long, as long as or longer than the lowest florets, less than twice as wide as the lower glumes;

callus hairs to 1 mm;

lemmas 3-6(7) mm, narrowly to broadly lanceolate, glabrous or pilose, sometimes scabridulous, apices bifid, teeth usually shorter than 1 mm, awned, awns 3-8 mm, arising from the upper 1/3 of the lemmas and exceeding the apices, geniculate, twisted basally;

anthers 0.7-1.4 mm.

lanceolate or oblanceolate;

lower glumes about 5.5 mm long, about 1 mm wide, widest near the base, slenderly acuminate;

upper glumes to 6.3 mm long, about 2 mm wide at or just above the middle, acuminate;

callus hairs about 0.5 mm;

lemmas 5-6.5 mm long, about 1/3 as wide as long, apices bifid, teeth shorter than 1 mm, awned, awns 4-6 mm, arising about 1 mm below the teeth, not twisted basally, straight or flexuous, exceeding the lemma apices;

paleas almost equaling the lemmas;

anthers minute or to 1 mm, appearing non-functional;

ovaries pubescent.

1.5-3(4) mm, glabrous.

to 2.5 mm, malformed.

= 14, 28, 42.

= unknown.