Urtica dioica subsp. dioica

IllustratedIntroduced
Treatment appears in FNA Volume 3.

Stems hispid, with stinging hairs. Leaf-blades abaxially hispid, both surfaces with stinging hairs. Flowers unisexual, staminate and pistillate on different plants. 2n = 52.


Phenology: Flowering late spring–early fall.
Habitat: Alluvial woods, margins of deciduous woodlands, fencerows, waste places
Elevation: 0-500 m

Distribution

Introduced; Greenland, St. Pierre and Miquelon, B.C., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Ala., Alaska, Calif., Conn., Del., D.C., Fla., Ga., Maine, Md., Mass., Mich., Mo., N.H., N.J., N.Y., N.C., Ohio, Okla., Oreg., Pa., Tenn., Va., Wash., W.Va., native to Eurasia

Discussion

No documented specimens of Urtica diocia var. dioica are known from Vermont; it could occur there in similar habitats.

Selected References

None.

Lower Taxa

None.
0.13 cm1.3 mm <br />0.0013 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (?) +  and 0.13 cm1.3 mm <br />0.0013 m <br /> (?) +
ovoid +  and broadly ovoid +
0.7mm +  and 0.9mm +
acuminate +  and acute +
David E. Boufford +
Linnaeus +
rounded +  and cordate +
narrowly triangular;lanceolate +
Greenland +, St. Pierre and Miquelon +, B.C. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Ala. +, Alaska +, Calif. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Maine +, Md. +, Mass. +, Mich. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Oreg. +, Pa. +, Tenn. +, Va. +, Wash. +, W.Va. +  and native to Eurasia +
0-500 m +
reflexing +  and inflexed +
pistillate +  and staminate +
recurved +  and ascending +
loosely +  and free +
Alluvial woods, margins of deciduous woodlands, fencerows, waste places +
0.14 cm1.4 mm <br />0.0014 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
ovate +  and broadly ovate +
1.1mm;1.3mm +
6 cm60 mm <br />0.06 m <br /> (20 cm200 mm <br />0.2 m <br />) +
lanceolate or +  and narrowly broadly ovate +
rounded +  and linear +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
accrescent +
Flowering late spring–early fall. +
Illustrated +  and Introduced +
branched +  and simple +
sprawling +  and erect +
deciduous +  and persistent +
Urtica dioica subsp. dioica +
Urtica dioica +
subspecies +
reddish +, greenish +, green +  and white +
distinct +
outer +  and inner +
2 +  and 4 +
smaller +