Poison ivy (Toxicodendron radicans) is a vine that contains an oily resin known as urushiol. According to the Centers for ...

With March now upon us, St. Patrick’s Day is right around the corner. But Leprechauns, green beer and pots of gold aside, there is another traditional symbol associated with the ...

As can be seen in the pictures on this page, creeping oxalis has trifoliate leaves (each leaf has three leaflets), and each leaflet has a distinct notch out of the end of it. It is typically much ...

The fallen leaves crunched under my feet as I hiked through the woods at the edge of our property, searching for the hedgerow of trifoliate orange shrubs I desired to harvest. My eyes surveyed the ...