If you were a Girl Scout or a Boy Scout, you probably heard the adage "leaves of three, let them be" to deter you from getting poison ivy rash. And, while it is true that a poison ivy leaf contains ...

Poison ivy, Rhus radicans or Toxicodendron radicans, is an undeniable plant menace in home landscapes. I’m allergic to its plant oils, as you may be. It’s the plant we all love to hate. Purdue experts ...

Poison ivy has a compound leaf made up of 3 leaflets which can be 1 to 4 inches long. The middle leaflet is the only one with a long stalk. Courtesy Johnson County Extension Just the mention of the ...

We've all heard the classic saying "leaves of three, let it be," which means don't touch the poison ivy. But just how accurate is that timeless phrase? While this specific mnemonic device exists to ...

University of Guam Research Associate Benjamin Deloso examines a bi-pinnately compound leaf of Guam's flame tree. The endangered Serianthes nelsonii tree makes a leaf that uses this same design.