Plants of indefinite duration. Culms to 120 cm tall, bases long-decumbent
and rooting at the lower nodes. Sheaths 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. Panicles 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 with spikelets
in unequally pedicellate pairs; secondary branches absent; shorter
pedicels 0.3-0.8 mm; longer pedicels 1.7-2.7 mm. Spikelets
2.4-3.5 mm, homomorphic, ovate. Lower glumes 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. 2n = 70, 72.
Digitaria setigera is native to southeastern Asia. It is now established
in tropical America, growing in disturbed habitats in Florida and Central America,
and probably in tropical South America. It has often been confused with D.
Plants in the Flora region belong to Digitaria setigera Roth var. setigera.
Unlike plants of D. setigera var. calliblepharata (Henrard) Veldkamp,
they do not have large, glassy hairs on their lower lemmas.