Flora of North America species comparison

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

20-30 cm, decumbent and rooting at the nodes;

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.

mostly glabrous, throats with papillose-based hairs;

blades 4-7 cm long, 3-6 mm wide, glabrous.

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 2-4 spikelike primary branches, if more than 2, rachises 7-20 mm and the branches racemose;

primary branches 3-6 cm, terminal branch erect, the other(s) usually divergent, axes wing-margined, wings wider than the midribs, bearing spikelets in unequally pedicellate groups of 3 on the basal and mid-portions;

secondary branches rarely present;

shortest pedicels about 0.05 mm;

middle pedicels about 0.1 mm;

longest pedicels 0.2-0.3 mm, adnate to the branch axes basally;

axillary panicles not present.

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

homomorphic, 1.5-1.7 mm, lanceolate.

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.

glumes absent;

upper glumes almost equaling the upper lemmas, conspicuously 3-veined;

lower lemmas slightly longer than the upper lemmas, 7-veined, veins unequally spaced, all the intercostal regions sparsely hairy, hairs about 0.3 mm;

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

= 36.

= unknown.