Setaria setosa
Setaria texana
West Indian bristlegrass, West Indies bristlegrass
Texas bristlegrass
50-100 cm;
nodes usually glabrous.
30-70 cm, wiry, much branched distally.
glabrous or finely pubescent, margins ciliate distally;
ligules of 1 mm hairs;
blades 15-20 cm long, 6-12 mm wide, flat or folded, often finely pubescent on both surfaces.
keeled, margins ciliate distally;
collars glabrate;
ligules to 1 mm, densely ciliate;
blades 5-15 cm long, 2-4 mm wide, flat, scabrous.
15-20 cm, loosely spikelike, interrupted, attenuate;
rachises often villous;
branches ascending, lower branches about 2.5 cm;
bristles usually solitary, less than 10 mm, antrorsely scabrous.
2-6 cm, spikelike, basal portion rarely lobed, tapering distally;
rachises scabrous to puberulent;
bristles solitary, 3-10 mm.
2-2.5 mm, ovate-lanceolate.
1.9-2.1 mm.
about 1/2 as long as the spikelets, 3-veined;
upper glumes about 2/3 as long as the spikelets, 5-7-veined;
lower lemmas equaling the upper lemmas;
lower paleas as long as the upper paleas, broad;
upper lemmas finely and distinctly transversely rugose.
about 1/2 as long as the spikelets, 3-veined;
upper glumes about 3/4 as long as the spikelets, 5-veined;
lower lemmas nearly equaling the upper lemmas, 5-veined;
lower paleas rudimentary to 1/2 as long as the upper paleas;
upper lemmas finely and transversely rugose;
upper paleas narrow.
= unknown.
= 36.
Setaria setosa
Setaria texana
Setaria setosa is native to the West Indies and Mexico. It is probably a recent introduction to Florida, but appears to be established there. The specimen from New Jersey was from a ballast dump; the species is not established in that state.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Setaria texana grows in shaded habitats on sandy loam soils of the Rio Grande plain of south Texas and northeastern Mexico.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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