Setaria setosa
Setaria scheelei
West Indian bristlegrass, West Indies bristlegrass
Souths estern bristlegrass, Southwestern bristlegrass
50-100 cm;
nodes usually glabrous.
60-120 cm;
nodes pilose, with appressed hairs.
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.
glabrous or hispid;
ligules 1-2 mm, hispid;
blades 15-30 cm long, 6-15 mm wide, flat or folded, scabrous, often pubescent.
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.
15-25 cm, open, tapering from the base;
rachises pubescent to villous;
lower branches to 3 cm;
bristles usually solitary, 10-35 mm, divergent.
2-2.5 mm, ovate-lanceolate.
2.2-2.5 mm, elliptical.
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 from 3/4 as long as to equaling the upper florets, 5-veined;
lower lemmas equaling the upper lemmas, 5-veined;
lower paleas about 1/2 as long as the upper paleas, lanceolate;
upper lemmas finely cross-wrinkled, shortly apiculate;
upper paleas ovate-lanceolate.
= unknown.
= 54.
Setaria setosa
Setaria scheelei
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 scheelei grows in alluvial soils of canyons and river bottoms of New Mexico and Texas. Within the Flora region, it is particularly abundant in the limestone canyons of the Edwards Plateau of central Texas. Its range extends into central Mexico.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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