Flora of North America species comparison

(30)50-110 cm, clumped, erect, glabrous or pubescent.

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

2-3 per culm;

sheaths scabridulous or pilose;

ligules 1.5-3 mm, truncate, erose to lacerate;

blades (8.5)15-20+ cm long, (3)7-12 mm wide, flat, ascending, lax at maturity, often scabridulous.

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.

10-30 cm long, (1)2-9 cm wide, open, nodding, green or tan, occasionally purple-tinged;

branches 2-12+ cm, most, except sometimes the uppermost, spikelet-bearing only towards the apices, with the basal (1/5)1/3-1/2 bare, filiform, flexuous, at least the lowest 1-3 whorls spreading or drooping.

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.

6-12 mm, subsessile to pedicellate, pedicels to 2 cm, usually with 2-3 functional florets below 1-2 reduced florets;

rachilla internodes and hairs 1-2.5 mm;

disarticulation above the glumes, beneath the florets.

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.

unequal;

lower glumes 0.75-2(3) mm, subulate;

upper glumes 3.5-5 mm long, shorter than the lowest florets, 2-3 times as wide as the lower glumes, widest at or above the middle, ovate or obovate, rounded to the acuminate apices;

callus hairs to 1 mm;

lemmas 5-6 mm, broadly lanceolate, glabrous, bifid, teeth to 1.3 mm, awned, awns (7)9-14 mm, arising from above midlength to just below the teeth, exceeding the lemma apices, arcuate to flexuous;

paleas shorter than the lemmas;

anthers about 1 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.

2.5-3.2 mm, densely to sparsely pubescent.

to 2.5 mm, malformed.

= 42.

= unknown.