Flora of North America species comparison

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

35-140 cm, erect or decumbent, not rooting at the basal nodes.

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.

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 3-15 spikelike primary branches, digitate or with rachises to 3 cm;

primary branches 5-25 cm, wing-margined, wings wider than the midribs, bearing spikelets in unequally pedicellate pairs;

shorter pedicels 0.5-1.5 mm;

longer pedicels 1.5-3 mm.

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

homomorphic, 2.8-3.5 mm, narrowly lanceolate to narrowly elliptic.

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 0.3-0.5 mm, veinless, acute;

upper glumes 1.7-1.9 mm, wooly pubescent;

lower lemmas 2.5-3.5 mm, 7-veined, veins unequally spaced and smooth, occasionally the lateral veins scabridulous over the distal 1/4, margins and region between the 2 inner lateral veins appressed-pubescent, with 0.5-1.5 mm hairs;

upper lemmas gray when immature, becoming brownish at maturity;

anthers 1.2-1.6 mm, purple.

sheaths glabrous or pubescent, often densely so, hairs 4-6 mm, papillose-based;

ligules (1.8)3-5 mm, erose and ciliate;

blades 5-40 cm long, 3-6 mm wide, scabridulous, often also papillose-hairy.

= 36.

= 36.