Poison ivy, poison oak, and poison sumac are three plants notorious for causing itchy, uncomfortable rashes that can turn a pleasant outdoor experience into a nightmare. These plants contain ...

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

Another plant you really want to avoid touching is the wild parsnip. These look related to the aforementioned giant hogweed, ...

Poison ivy vines aren't ready to produce the bright green leaves as it covers a fence post near Adamsville, Penn. THE BLADE/DAVID PATCH Buy This Image Poison ivy heavily infests this lilac bush at ...

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When you’re spending time outdoors this summer, in your own yard or hiking in a park, it’s useful to know to spot poison ivy.

More days above freezing creates a longer growing season, which in turn means a longer allergy season. More carbon dioxide in the atmosphere also means more pollen and stronger pollen for common ...