Setaria setosa
Setaria macrosperma
West Indian bristlegrass, West Indies bristlegrass
coral bristlegrass
50-100 cm;
nodes usually glabrous.
1-1.5 m. Sheaths prominently keeled, margins villous;
ligules 1-3 mm;
blades 1-2 cm wide, flat, scabrous.
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.
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.
to 25 cm, loosely spicate;
rachises readily visible, sparsely villous;
bristles 1(2), 15-30 mm, flexible, antrorsely scabrous.
2-2.5 mm, ovate-lanceolate.
3-3.2 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 1/3 as long as the spikelets, 3-veined;
upper glumes about 3/4 as long as the spikelets, 5-veined;
lower lemmas equaling the upper lemmas;
lower paleas about 1/2 as long as the upper paleas, hyaline, narrow;
upper lemmas finely and transversely rugose;
upper paleas similar to the upper lemmas.
= unknown.
= unknown.
Setaria setosa
Setaria macrosperma
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 macrosperma grows on shell or coral islands, and occasionally in old fields or hammocks. It is most frequent in Florida, but has been collected in both South Carolina and Georgia. It also grows in the Bahamas and Mexico.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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