Setaria pumila

(Poir.) Roem. & Schult.
Common names: Yellow foxtail Pigeon grass
Introduced
Treatment appears in FNA Volume 25. Treatment on page 558.

Plants annual. Culms 30-130 cm. Sheaths glabrous; ligules ciliate; blades 4-10 mm wide, loosely twisted, adaxial surfaces with papillose-based hairs basally. Panicles 3-15 cm, uniformly thick, erect, densely spicate; rachises hispid; bristles 4-12, 3-8 mm, antrorsely scabrous. Spikelets 2-3.4 mm, strongly turgid. Lower glumes about 1/3 as long as the spikelets, 3-veined, acute; upper glumes about 1/2 as long as the spikelets, 5-veined, ovate; upper florets often staminate; lower lemmas equaling the upper lemmas; lower paleas equaling the lower lemmas, broad; upper lemmas conspicuously exposed, strongly transversely rugose. 2n = 36, 72.

Distribution

Va., Colo., Mass., Tex., La., Ohio, Ariz., Utah, Ala., D.C., Ark., Calif., Conn., Del., Fla., Ga., Pacific Islands (Hawaii), Iowa, Idaho, Ill., Ind., Kans., Ky., Md., Maine, Mich., Minn., Mo., Miss., Mont., N.C., N.Dak., Nebr., N.H., N.J., N.Mex., Nev., N.Y., Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Vt., Wash., Wis., W.Va., Wyo., Alta., B.C., Man., N.B., Nfld. and Labr. (Labr.), N.S., Ont., P.E.I., Que., Sask.

Discussion

Selected References

None.

Key

1 Spikelets 3-3.4 mm long; bristles yellow Setaria pumila subsp. pumila
2 Spikelets 2-2.5 mm long; bristles reddish subsp. pallidefusca Setaria pumila subsp. pallidefusca

"decumbent" is not a number."elongated" is not a number."thick" is not a number.

... more about "Setaria pumila"
not penicillate +
anatomy +  and kranz +
James M. Rominger +
(Poir.) Roem. & Schult. +
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 /> (?) +
4mm;10mm +
spikelike +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
not developed +
compressed +, ellipsoid +  and subglobose +
sometimes longer +
Yellow foxtail +  and Pigeon grass +
branched +  and solid +
decumbent +  and erect +
30 cm300 mm <br />0.3 m <br /> (130 cm1,300 mm <br />1.3 m <br />) +
Va. +, Colo. +, Mass. +, Tex. +, La. +, Ohio +, Ariz. +, Utah +, Ala. +, D.C. +, Ark. +, Calif. +, Conn. +, Del. +, Fla. +, Ga. +, Pacific Islands (Hawaii) +, Iowa +, Idaho +, Ill. +, Ind. +, Kans. +, Ky. +, Md. +, Maine +, Mich. +, Minn. +, Mo. +, Miss. +, Mont. +, N.C. +, N.Dak. +, Nebr. +, N.H. +, N.J. +, N.Mex. +, Nev. +, N.Y. +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Vt. +, Wash. +, Wis. +, W.Va. +, Wyo. +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Labr.) +, N.S. +, Ont. +, P.E.I. +, Que. +  and Sask. +
capillary +
germination +
pistillate +  and staminate +
sometimes longer +
compressed +  and terete +
shorter or longer +
subtending +
unequal +
membranous +
papillose-based +
uncinate +
bracteate +  and ebracteate +
solid +  and hollow +
cauline +  and basal +
coriaceous +
membranous +
inconspicuous +
not constricted +
indurate +  and membranous +
complex +  and simple +
concealed +  and prominent +
2 +  and 1 +
subterranean +
spikelike +
3 cm30 mm <br />0.03 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 +
0.2 cm2 mm <br />0.002 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
1 (?) +  and 3 (?) +
fused +  and free +
red +  and white +
fused +  and free +
dome--shaped +  and triangular +
Gramineae +
Setaria pumila +
Setaria subg. Setaria +
species +
membranous +
membranous +  and herbaceous +
reduced +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +