Urtica urens
Urtica gracilenta
annual nettle, annual stinging nettle, burning nettle, dog nettle, dwarf nettle, small nettle
mountain nettle
simple or branched, erect.
simple or branched from base, erect.
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.
blades ovate to broadly ovate, distal blades becoming ovate-lanceolate to lanceolate, 7-15 × 5-10 cm, base truncate to cordate, margins coarsely dentate, apex acute to caudate;
cystoliths rounded or occasionally elongate.
spikelike or paniculate.
racemose, elongate.
unisexual, staminate and pistillate in same inflorescence, subsessile to short-pedunculate.
unisexual, staminate and pistillate in separate inflorescences, or with a few pistillate flowers at apex of staminate inflorescences, subsessile to short-pedunculate.
outer tepals ovate, 0.5-0.7 mm, inner tepals broadly ovate, 0.6-0.9 × 1.2-1.4 mm.
outer tepals lanceolate to narrowly ovate, 0.8-1 mm, inner tepals broadly ovate, 1.4-2.2 × 1.3-1.4 mm.
ovoid, 1.5-1.8 × 1.1-1.3 mm.
ovoid, 1.4-1.6 × 1-1.1 mm.
= 24, 26.
= 26.
Urtica urens
Urtica gracilenta
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).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
- Local floras:
BC, 
CA, 
OR, 
WA - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
Go Botany, 
IL Wildflowers, 
MI Flora, 
MO Plants, 
PNW Herbaria 
WildflowerSearch
iNaturalist (observations)
USDA Plants Database- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
