Add Yahoo as a preferred source to see more of our stories on Google. Depending on where you live, you might find yourself in the presence of poison ivy, poison oak or poison sumac on your next hike.

Staghorn sumac, smooth sumac and winged sumac are the three most common species of red-fruited sumac found in Pennsylvania. Staghorn sumac (Rhus typhina) and smooth sumac (Rhus glabra) are similar in ...

One recent hot morning a light wind was blowing yellow leaves off walnut and poplar trees. It had been hot and humid for several days, which accounts for some of the yellow leaves, but these leaf ...

A thicket of smooth sumac retained some of its berries in January, though most of them were gone. Smooth sumac is well known for its brilliant red fall foliage and its deep red berries. Smooth sumac, ...

As temperatures in the First State start to increase, people will be spending more time outdoors. Whether gardening or hiking, Delaware residents need to be on the lookout for certain plants that will ...

What’s that red in the woods? Sumac, most likely. “It’s a harbinger,” said Julie Janoski, Plant Clinic Manager at The Morton Arboretum. “When you see those first scarlet sumac leaves, you know autumn ...

Poison ivy has three leaves, and the middle leaf has a longer stem. Touching poison ivy causes an allergic reaction due to urushiol oil. Poison oak and poison sumac are related to poison ivy and also ...

The eastern face of Flagstaff Mountain lights up each fall as clones of smooth sumac, Rhus glabra, turn brilliant red. Fall brings out the best in clonal species — quaking aspen, gambel oak, ...

Warmer weather and longer days often mean more time spent outdoors. As activities such as hiking, mountain biking and beach sports become more popular, so does the risk of encountering substances that ...

The eastern face of Flagstaff Mountain lights up each fall as clones of smooth sumac, Rhus glabra, turn brilliant red. Fall brings out the best in clonal species — quaking aspen, gambel oak, ...