Flora of North America species comparison

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

60-100 cm, erect.

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.

villous, particularly the lower sheaths;

ligules 0.2-0.4, fimbriate;

blades to 47 cm long, 1-2.1 mm wide, involute, glabrous and smooth abaxially, scabrous adaxially, sometimes with a few long hairs near the base.

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.

of 2-3(5) spikelike primary branches on elongate rachises;

primary branches 8-13(20) cm, narrowly winged, wings no more than 1/2 as wide as the midribs, bearing spikelets in unequally pedicellate groups of 3-4(5);

secondary branches rarely present;

longest pedicels to 5 mm.

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

1.7-2.3 mm, elliptical, glabrous.

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.

absent;

upper glumes 0.9-1 mm, less than 1/2 as long as the spikelets, 3-veined, glabrous, broadly rounded to truncate;

lower lemmas slightly shorter than the spikelets, 5-veined, glabrous;

upper lemmas smooth, brown when immature, dark brown at maturity.

= 36.

= unknown.