Andropogon virginicus var. virginicus

Synonyms: Andropogon virginicus var. tetrastachyus
Treatment appears in FNA Volume 25. Treatment on page 661.

Culms 40-210 cm; internodes green. Leaves green or slightly glaucous, glabrous or pubescent, at least on the margins near the collar. Inflorescence units with 2-5 (7) rames; subtending sheaths (2.2) 3.3-4.4 (5.6) mm wide; peduncles (2) 3-6 (12) mm; rames (0.5) 1.9-3.3 (4.4) cm, not exserted.

Distribution

Del., W.Va., Pacific Islands (Hawaii), Fla., Puerto Rico, N.J., Conn., Mass., R.I., La., N.C., Tenn., N.Y., Pa., Va., Ont., Calif., Ala., Ark., Ill., Ga., Ind., Iowa, Okla., Ky., Md., Tex., Ohio, Mo., Mich., Miss., D.C., Kans., S.C.

Discussion

Andropogon virginicus var. virginicus is the widespread and weedy variety of A. virginicus that grows as a native species from the central plains through Mexico and Central America to Colombia and, as a naturalized species, in California, Hawaii, Japan, and Australia.

Plants colonizing openings in mature vegetation created by disturbance have green culms and green, pubescent leaves. Those growing in poorly drained soils of pond margins, swales, and cutover flatwoods have glaucous culms and glabrous, green to somewhat glaucous leaves. Glaucous plants of A. virginicus var. virginicus differ from those of var. decipiens in having no exposed rames and, often, wider sheaths subtending the inflorescence units.

Selected References

None.

Lower Taxa

None.

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

purple +  and yellow +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
anatomy +  and kranz +
Christopher S. Campbell +
1 (?) +  and 3 (?) +
0.6 cm6 mm <br />0.006 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
terete +  and flattened +
slender +
keeled +  and rounded +
pseudopetiolate +  and branching +
divergent +  and parallel +
intravaginal +, extravaginal +, branching +  and basal +
swelling +
pseudopetiolate +
non-radiate +  and radiate +
well-developed +
11 cm110 mm <br />0.11 m <br /> (52 cm520 mm <br />0.52 m <br />) +
glabrous or +  and sparsely densely pubescent +
convolute +, folded +, flat +  and linear +
reduced +
1.7mm;6.5mm +
arching;erect;ascending +
spikelike +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
much-branched +
purple +  and reddish +
40 cm400 mm <br />0.4 m <br /> (210 cm2,100 mm <br />2.1 m <br />) +
not woody +
Del. +, W.Va. +, Pacific Islands (Hawaii) +, Fla. +, Puerto Rico +, N.J. +, Conn. +, Mass. +, R.I. +, La. +, N.C. +, Tenn. +, N.Y. +, Pa. +, Va. +, Ont. +, Calif. +, Ala. +, Ark. +, Ill. +, Ga. +, Ind. +, Iowa +, Okla. +, Ky. +, Md. +, Tex. +, Ohio +, Mo. +, Mich. +, Miss. +, D.C. +, Kans. +  and S.C. +
capillary +
sometimes longer +
concealing +
compressed +  and terete +
shorter or longer +
subtending +
compressed +  and rounded +
unequal +
uncinate +
bracteate +  and ebracteate +
pedunculate +  and multiple-stalked +
3.1 cm31 mm <br />0.031 m <br /> (4.6 cm46 mm <br />0.046 m <br />) +
0.33 cm3.3 mm <br />0.0033 m <br /> (0.44 cm4.4 mm <br />0.0044 m <br />) +
with inconspicuous veins +  and veined +
fimbriate +  and cupulate +
solid +  and hollow +
(0.5)1.7-2.8(4.4) cm +, not +  and glaucous +
photosynthetic +
not aromatic +
pubescent +, glabrous +  and glaucous +
coriaceous +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
membranous +
inconspicuous +
2-9-veined +  and veined +
concave +, flat +  and 2-keeled +
complex +  and simple +
concealed +  and prominent +
sessile-pedicellate +
heterogamous +
not fused +
3 cm30 mm <br />0.03 m <br /> (?) +
0.5 cm5 mm <br />0.005 m <br /> (?) +  and 2 cm20 mm <br />0.02 m <br /> (?) +
1.9 cm19 mm <br />0.019 m <br /> (?) +  and 3.3 cm33 mm <br />0.033 m <br /> (?) +
dry +  and fleshy +
elongate +
pedicellate +  and sessile +
in triplets +  and paired +
well-developed +
usually smaller +  and reduced +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
1 (?) +  and 3 (?) +
fused +  and free +
2 (?) +  and 3 (?) +
dome--shaped +  and triangular +
Andropogon virginicus var. tetrastachyus +
Andropogon virginicus var. virginicus +
Andropogon virginicus +
variety +
membranous +
sessile-pedicellate +
inconspicuous +
plant +  and cespitose +
aquatic +  and terrestrial +
dioecious +, monoecious +  and synoecious +
cylindrical +  and obpyramidal +