Setaria setosa

(Sw.) P. Beauv.
Common names: West indies bristlegrass
Introduced
Treatment appears in FNA Volume 25. Treatment on page 550.

Plants perennial. Culms 50-100 cm; nodes usually glabrous. Sheaths 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. Panicles 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. Spikelets 2-2.5 mm, ovatelanceolate. Lower glumes 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. 2n = unknown.

Distribution

Puerto Rico, N.J., Virgin Islands, Ala., Fla.

Discussion

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.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Setaria setosa"
not penicillate +
anatomy +  and kranz +
James M. Rominger +
(Sw.) P. Beauv. +
1 (?) +  and 3 (?) +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
non-radiate +  and radiate +
15 cm150 mm <br />0.15 m <br /> (20 cm200 mm <br />0.2 m <br />) +
folded +  and flat +
20 cm200 mm <br />0.2 m <br /> (?) +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
spikelike +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not developed +
compressed +, ellipsoid +  and subglobose +
sometimes longer +
West indies bristlegrass +
branched +  and solid +
decumbent +  and erect +
50 cm500 mm <br />0.5 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Puerto Rico +, N.J. +, Virgin Islands +, Ala. +  and Fla. +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
uncinate +
1 cm10 mm <br />0.01 m <br /> (?) +
bracteate +  and ebracteate +
solid +  and hollow +
cauline +  and basal +
coriaceous +
membranous +
inconspicuous +
2.5 cm25 mm <br />0.025 m <br /> (?) +
not constricted +
indurate +  and membranous +
rarely exceeding the upper lemmas +  and equaling +
complex +  and simple +
concealed +  and prominent +
2 +  and 1 +
subterranean +
attenuate +  and spikelike +
15 cm150 mm <br />0.15 m <br /> (20 cm200 mm <br />0.2 m <br />) +
dry +  and fleshy +
pubescent +  and glabrous +
Introduced +
subsessile +  and short pedicellate +
in triplets +  and paired +
unisexual +  and bisexual +
ovatelanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
1 +  and 3 +
fused +  and free +
red +  and white +
fused +  and free +
dome--shaped +  and triangular +
Gramineae +
Setaria setosa +
Setaria subg. Setaria +
species +
membranous +
membranous +  and herbaceous +
not keeled +
reduced +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +