Urtica Dioica L. (family Urticaceae) DESCRIPTION: Many species have stinging hairs on the stems and leaves. The leaves are varied and the sap is usually watery. The small, greenish flowers often form clusters in the leaf axils. RANGE: Distributed primarily in tropical regions. APPLICATION: Used as a treatment for urinary difficulties arising from the early stages of prostate adenoma or BPH. Because the active principles are apparently water soluble, the root may be administered as a tea. ...