Flora of North America species comparison

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

15-40(63) cm, rooting and branching from the lower nodes.

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.

densely to sparsely hairy, with 3-5 mm papillose-based hairs;

ligules 1-1.5 mm;

blades 2.5-7 cm long, 1-3 mm wide, flat or folded, usually glabrous, green to bluish-green.

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 2-4 spikelike primary branches digitately arranged;

primary branches 2-7 cm, axes wing-margined, wings at least 1/2 as wide as the midribs, spikelets somewhat imbricate, in unequally pedicellate pairs;

secondary branches rarely present;

pedicels not adnate to the branches;

shorter pedicels 1-1.5 mm;

longer pedicels 2-3 mm;

axillary panicles not present.

2.4-3.5 mm, homomorphic, ovate.

homomorphic, 2-2.8 mm long, about 0.8 mm wide.

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.

to 0.3 mm, triangular;

upper glumes from 1/2 - 3/4 as long as the spikelets, 3-veined, pilose on the margins and sometimes between the veins;

upper lemmas equaling the spikelets, prominently 7-veined, veins equally spaced, margins and sometimes the intercostal regions pilose, hairs 0.3-0.5 mm;

upper lemmas slightly shorter than the lower lemmas, almost smooth, gray, sometimes purple-tinged, at maturity.

= 70, 72.

= unknown.