Setaria verticilliformis

Dumort.
Common names: Barbed bristlegrass
Synonyms: Setaria verticillata var. ambigua
Treatment appears in FNA Volume 25. Treatment on page 554.

Plants annual. Culms 30-100 cm; nodes glabrous. Sheaths mostly glabrous, margins ciliate distally; ligules 1-2 mm, of hairs; blades 5-15 mm wide, flat, abaxial surfaces scabrous, adaxial surfaces sparsely villous. Panicles 5-15 cm, tapering to the apices, branches verticillate; rachises antrorsely rough hispid, without villous hairs; bristles solitary, 4-7 mm, antrorsely or retrorsely scabrous. Spikelets 2-2.3 mm. Lower glumes about 1/3 as long as the spikelets, obtuse, 1 (3) -veined; upper glumes nearly as long as the spikelets; lower paleas about 1/2 as long as the spikelets, broad; upper lemmas finely and transversely rugose; upper paleas similar to the upper lemmas. 2n = 36.

Distribution

Md., N.J., Mo., Ala., Wis., D.C., N.Y., Pa.

Discussion

Setaria verticilliformis is a European adventive that has been found at scattered, mostly urban, locations in the United States.

Selected References

None.

Lower Taxa

None.

"decumbent" is not a number.

... more about "Setaria verticilliformis"
not penicillate +
anatomy +  and kranz +
James M. Rominger +
Dumort. +
1 (?) +  and 3 (?) +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
membranous +
non-radiate +  and radiate +
usually linear +  and lanceolate occasionally ovate +
20 cm200 mm <br />0.2 m <br /> (?) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
verticillate +
spikelike +
0 cm0 mm <br />0 m <br /> (1 cm10 mm <br />0.01 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 +
Barbed bristlegrass +
branched +  and solid +
decumbent +  and erect +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
Md. +, N.J. +, Mo. +, Ala. +, Wis. +, D.C. +, N.Y. +  and Pa. +
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 +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
membranous +
inconspicuous +
not constricted +
indurate +  and membranous +
rarely exceeding the upper lemmas +  and equaling +
complex +  and simple +
concealed +  and prominent +
2 +  and 1 +
subterranean +
5 cm50 mm <br />0.05 m <br /> (15 cm150 mm <br />0.15 m <br />) +
dry +  and fleshy +
subsessile +  and short pedicellate +
in triplets +  and paired +
unisexual +  and bisexual +
acutish +  and obtuse +
0.2 cm2 mm <br />0.002 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
1 +  and 3 +
fused +  and free +
red +  and white +
fused +  and free +
dome--shaped +  and triangular +
Setaria verticillata var. ambigua +
Setaria verticilliformis +
Setaria subg. Setaria +
species +
membranous +
membranous +  and herbaceous +
not keeled +
reduced +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +