Found throughout the United States except in the southwest and northern Great Plains. First true leaves are opposite and have distinctly serrated margins.
Lower leaves are opposite, upper ones are alternate.
Individual leaflets have serrated margins and are hairy. Rough to the touch, hairy, somewhat grooved, and branched. Hairs along the stem exude a sap that contributes to the distinctive smell of this plant. Female flowers also arise from the leaf axils, but are spikelike clusters. An achene that is approximately 4 mm long, oval in shape, and yellow to brown in color.