Flora of North America species comparison

80-130 cm, erect, with densely villous cataphylls, branching from the lower and middle nodes.

20-60 cm, erect;

lower nodes glabrous or pubescent;

upper nodes glabrous.

usually sparsely to densely papillose-hirsute, occasionally glabrous;

ligules 4-6 mm, usually lacerate, not ciliate;

blades 20-50 cm long, 10-17 mm wide, lax, smooth or scabridulous abaxially, scabridulous to scabrous adaxially.

mainly cauline;

sheaths usually glabrous, lower sheaths sometimes pubescent;

ligules 0.4-1 mm, truncate, entire to lacerate;

blades 5-11.5 cm long, 3-4.5 mm wide, glabrous, usually flat or folded.

20-35 cm long, 2-10 cm wide, with numerous spikelike primary branches;

primary branches 10-15 cm, appressed to ascending at maturity, axes not wing-margined or with wings less than 1/2 as wide as the midribs;

internodes 3-4.5(6) mm (midbranch), bearing spikelets in unequally pedicellate pairs;

secondary branches rarely present;

pedicels not adnate to the branches;

shorter pedicels 0.7-2 mm;

longer pedicels 2.5-5 mm;

terminal pedicels 2-5 mm.

simple, 12-24 cm long, 19-40 cm wide, open;

nodes hispid;

branches divergent;

lower primary branches 10-21 cm, with 1-several sterile branches near the base;

pedicels divergent, spikelets solitary.

5.5-8.2 mm (including pubescence), 4.2-5.9 mm (excluding pubescence), narrowly ovate, acuminate.

3.5-4.6 mm long, 0.8-1 mm wide, elliptical.

0.6-0.8 mm;

upper glumes 3.5-4.5 mm, 3-5-veined, pubescent on the margins;

lower lemmas 4.1-5.7 mm (exceeded 1.5-5 mm by pubescence), narrowly ovate, 7-veined, pubescent between most, sometimes all, of the veins and on the margins, veins usually obscured by a dense covering of golden-brown hairs, hairs 3-6 mm, spreading at maturity, intercostal regions on either side of the midvein glabrous or pubescent with shorter, fine, white hairs, sometimes intermixed with the golden-brown hairs;

upper lemmas 3.2-4.5 mm, narrowly ovate, brown when immature, dark brown at maturity, acuminate;

anthers 1-1.2 mm.

0.2-0.5 mm;

upper glumes 3-3.8 mm, 5-7-veined, densely villous between the veins, hairs white, becoming purple at maturity;

lower lemmas similar to the upper glumes in size, texture, and pubescence;

upper lemmas 3-3.7 mm, narrowly acute, dark brown;

anthers 1.1-1.4 mm.

1.5-2 mm.

= 36.

= 36, 37.