Urtica urens

Linnaeus

Sp. Pl. 2: 984. 1753.

Common names: Dog nettle burning nettle
Introduced
Treatment appears in FNA Volume 3.
Revision as of 21:45, 5 November 2020 by imported>Volume Importer

Herbs, annual, with taproot, 1-8 dm. Stems simple or branched, erect. Leaf blades elliptic to broadly elliptic, widest near middle, 1.8-9 × 1.2-4.5 cm, base cuneate, margins coarsely serrate, serrations often with lateral lobes, apex acute; cystoliths rounded. Inflorescences spikelike or paniculate. Flowers unisexual, staminate and pistillate in same inflorescence, subsessile to short-pedunculate. Pistillate flowers: outer tepals ovate, 0.5-0.7 mm, inner tepals broadly ovate, 0.6-0.9 × 1.2-1.4 mm. Achenes ovoid, 1.5-1.8 × 1.1-1.3 mm. 2n = 24, 26.


Phenology: Flowering spring–summer.
Habitat: Waste places, roadsides, pastures, barnyards, cultivated fields, rich woodlands
Elevation: 0-700 m

Distribution

V3 1049-distribution-map.gif

Introduced; Greenland, St. Pierre and Miquelon, Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Sask., Yukon, Ala., Alaska, Ariz., Calif., Conn., Fla., Ill., Iowa, Maine, Mass., Mich., Mo., Nev., N.H., N.Mex., N.Y., Okla., Oreg., Pa., R.I., S.C., Tex., Vt., Wash., Eurasia.

Discussion

Within the flora, Urtica urens is most abundant in California and in eastern Canada. The Shuswap used it medicinally for sweatbaths and for pain from rheumatism (D. E. Moerman 1986).

Selected References

None.

Lower Taxa

None.
... more about "Urtica urens"
David E. Boufford +
Linnaeus +
Dog nettle +  and burning nettle +
Greenland +, St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Ala. +, Alaska +, Ariz. +, Calif. +, Conn. +, Fla. +, Ill. +, Iowa +, Maine +, Mass. +, Mich. +, Mo. +, Nev. +, N.H. +, N.Mex. +, N.Y. +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, Tex. +, Vt. +, Wash. +  and Eurasia. +
0-700 m +
Waste places, roadsides, pastures, barnyards, cultivated fields, rich woodlands +
Flowering spring–summer. +
W2 +  and Introduced +
Urtica urens +
species +