Setaria rariflora

J.C. Mikan ex Trin.
Common names: Brazilian bristlegrass
Introduced
Treatment appears in FNA Volume 25. Treatment on page 550.

Plants perennial. Culms 30-70 cm, usually erect, branching profusely at the base; nodes glabrous or sparsely hispid. Sheaths keeled, sparsely pubescent, margins ciliate distally; ligules to 1 mm, of hairs; blades 15-30 cm long, usually less than 5 mm wide, densely pubescent on both surfaces. Panicles 5-15 cm, slender, attenuate, interrupted, sparsely flowered; rachises pubescent; branches mostly shorter than 10 mm, villous; bristles usually solitary, 4-7 mm, antrorsely scabrous. Spikelets about 2 mm, ovatelanceolate. Lower glumes about 1/3 as long as the spikelets, 3-veined; upper glumes about 1/2 as long as the spikelets, 5-7-veined; lower lemmas equaling the upper lemmas; lower paleas equaling the upper paleas, broad; upper lemmas finely and distinctly transversely rugose; upper paleas similar to the upper lemmas. 2n = unknown.

Distribution

Puerto Rico, Virgin Islands, Fla., Ala.

Discussion

Setaria rariflora has its center of distribution in South America. It is probably only recently adventive in North America, where it is known from Florida and the West Indies.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Setaria rariflora"
not penicillate +
anatomy +  and kranz +
James M. Rominger +
J.C. Mikan ex Trin. +
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 /> (30 cm300 mm <br />0.3 m <br />) +
usually linear +  and lanceolate occasionally ovate +
20 cm200 mm <br />0.2 m <br /> (?) +
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
spikelike +
10 cm100 mm <br />0.1 m <br /> (?) +
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
not developed +
compressed +, ellipsoid +  and subglobose +
sometimes longer +
Brazilian bristlegrass +
30 cm300 mm <br />0.3 m <br /> (70 cm700 mm <br />0.7 m <br />) +
Puerto Rico +, Virgin Islands +, Fla. +  and Ala. +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
uncinate +
bracteate +  and ebracteate +
solid +  and hollow +
cauline +  and basal +
coriaceous +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
membranous +
inconspicuous +
not constricted +
indurate +  and membranous +
rarely exceeding the upper lemmas +  and equaling +
complex +  and simple +
concealed +  and prominent +
hispid +  and glabrous +
2 +  and 1 +
flowered +  and interrupted +
subterranean +
attenuate +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
dry +  and fleshy +
Introduced +
subsessile +  and short pedicellate +
in triplets +  and paired +
unisexual +  and bisexual +
ovatelanceolate +
2 cm20 mm <br />0.02 m <br /> (?) +
1 +  and 3 +
fused +  and free +
red +  and white +
fused +  and free +
dome--shaped +  and triangular +
Gramineae +
Setaria rariflora +
Setaria subg. Setaria +
species +
membranous +
membranous +  and herbaceous +
not keeled +
reduced +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +