Adicea glaberrima.

Botanical name: 

ADICEA GLABERRIMA, Raf. 1815. (Urtica pumila, L.) Cool weed. Very common. Very different from nettles, quite smooth and cool. The leaves applied or bruised give immediate relief in inflammations and painful swellings. As a wash, they cure the topical poison of Rhus or Sumac. Called Newasha, meaning as cool as ice, by the Osages. Its peculiar grateful strong smell indicates other propterites.

Medical Flora, or Manual of the Medical Botany of the United States of North America, Vol. 2, 1830, was written by C. S. Rafinesque.