Flora of North America species comparison

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

40-90 cm, erect, unbranched, glabrous;

nodes 1-2.

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.

densely hairy, hairs papillose-based;

ligules 0.8-2.2 mm;

blades 10-24 cm long, 2-4.5 mm wide, with papillose-based hairs.

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.

with 2-3 spikelike primary branches on 4-7 mm rachises;

secondary branches rarely present;

primary branches (5)10-22 cm, axes 0.5-0.6 mm wide, not wing-margined, middle portions of the branches bearing spikelets in groups of 3;

pedicels appressed to the axes.

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

2.3-2.4 mm, lanceolate to oblanceolate-elliptic;

lower glumes absent;

upper glumes 1.4-1.5 mm, more than 1/2 as long as the spikelets, 3-veined, truncate to acute, mostly glabrous, apices sparsely hairy;

lower lemmas about as long as the spikelets, 7-veined, mostly glabrous, apices sparsely hairy;

upper lemmas 2.3-2.4 mm, dark brown to black, apiculate;

anthers 1-1.1 mm.

glumes 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.

= 36.

= unknown.