That familiar phrase, "leaves of three, let it be," is a homeowner's warning, often whispered with a shiver. Poison ivy ( Toxicodendron radicans) is a pervasive, irritating plant that can turn a dream ...

Overgrown and tangled, the greenery growing close to the chapel at Assumption University was more than an eyesore in the highly trafficked area. It also presented a danger to students and staff.

Poison ivy grows in a lot more places than you might think, so knowing how to identify it this summer is a good idea.