Flora of North America species comparison

to 120 cm tall, bases long-decumbent and rooting at the lower nodes.

5-80 cm, decumbent, occasionally rooting at the lower nodes, branching freely at the base, erect portion 20-40 cm;

nodes 2-6.

with papillose-based hairs;

ligules 2.5-3.5 mm;

blades 4-28 cm long, 4-12 mm wide, scabrous, usually with some scattered papillose-based hairs on the base of the adaxial surfaces, sometimes with hairs all over.

of midculm leaves glabrous or hirsute, with papillose-based hairs;

ligules 0.8-2.1 mm;

blades 4-15 cm long, 3-10 mm wide, glabrous or sparsely pubescent with papillose-based hairs.

with 3-11 spikelike primary branches in 1-several whorls, rachises to 6 cm;

primary branches 5-15 cm, axes wing-margined, wings more than 1/2 as wide as the midribs, lower and middle portions bearing spikelets in unequally pedicellate pairs;

secondary branches absent;

shorter pedicels 0.3-0.8 mm;

longer pedicels 1.7-2.7 mm.

with 2-25 spikelike primary branches on 1-9 cm rachises;

primary branches 2-11 cm, axes not winged or narrowly winged, wings less than 1/2 as wide as the midribs, bearing spikelets in unequally pedicellate pairs;

secondary branches rarely present;

pedicels not adnate to the branch axes.

2.4-3.5 mm, homomorphic, ovate.

1.5-2.5 mm long, 0.8-0.95 mm wide, ovate-elliptic to broadly elliptic, usually plump, usually purple-tinged.

absent or to 0.1 mm;

upper glumes 0.2-1.3 mm, 1/6 - 1/3 as long as the spikelets, 1-3-veined, margins and apices with appressed, white hairs about 0.5 mm, truncate or bilobed;

lower lemmas (5)7-veined, veins smooth or scabrous only over the distal 1/3, unequally spaced, margins and lateral intercostal regions silky-ciliate;

upper lemmas tan or gray when immature, brown at maturity, acuminate;

anthers 0.6-1.3 mm.

absent or to 0.8 mm and acute;

upper glumes 1.2-2.4 mm, from 0.8 times as long as to almost equaling the spikelets, glabrous, 3-7-veined, veins usually prominent;

lower lemmas 1.5-2.5 mm, usually glabrous, occasionally obscurely puberulent on the margins or, very rarely, distinctly pubescent, 7-veined, veins usually prominent;

upper lemmas light brown, gray, and purple.

= 70, 72.

= 36.