Are you among the millions of people who set out into the great outdoors every year? If so, are you familiar with Urtica? If not, you certainly should be. Collectively known as nettle, these plants inhabit drainage ditches, stream banks, and other moist soils in North America and throughout the Northern Hemisphere. Nettle deserves your attention. In fact, it actually demands your attention. Even the slightest brush of skin against the stems or leaves of the plant will immediately result in a painful sting.