Urtica chamaedryoides
Urtica urens
heartleaf nettle, slim stingingnettle
annual nettle, annual stinging nettle, burning nettle, dog nettle, dwarf nettle, small nettle
usually branched from base, erect or reclining.
simple or branched, erect.
blades narrowly ovate to orbiculate, distal blades sometimes lanceolate, 2-8 × 1-6 cm, base nearly cordate to rounded, sometimes cuneate in distal leaves, margins serrate, apex rounded to acute;
cystoliths rounded or ± elongate.
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.
± globose cymes.
spikelike or paniculate.
unisexual, staminate and pistillate intermixed in same inflorescence, sessile to short-pedunculate.
unisexual, staminate and pistillate in same inflorescence, subsessile to short-pedunculate.
outer tepals linear, 0.4-0.8 mm, inner tepals ovate, 1.4-2 × 1-1.4 mm.
outer tepals ovate, 0.5-0.7 mm, inner tepals broadly ovate, 0.6-0.9 × 1.2-1.4 mm.
ovoid to broadly ellipsoid, 1.2-1.4(-1.6) × 0.8-1 mm.
ovoid, 1.5-1.8 × 1.1-1.3 mm.
= 26.
= 24, 26.
Urtica chamaedryoides
Urtica urens
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.)
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