Sentence:  It is stated that the pain caused by the sting of this plant will be instantly relieved by the milky juice of of the lower part of the stem of "Colocasia macorrhiza" (“<WSD>Cunjevoi</WSD>” of the natives), being rubbed on the affected part. 
Meaning of the word marked with <WSD> tags:  A large flowering plant, (species), native to tropical islands from Asia to Australia.