Poison Ivy
Leaves of three, let it be
Urushiol oil on the leaves, stems, and roots causes an itchy, blistering rash in most people. It won't kill you, but it will ruin your week.
Some people brag that they're immune. Most of them are just temporarily lucky — sensitivity can develop suddenly after years of casual contact.
A warning dressed in green: not everything attractive wants to be touched.
"Nature does not hurry, yet everything is accomplished — including the rash."
— Not Lao Tzu
