Poison ivy, oak, and sumac all contain an oil called urushiol (yur-oo-shee-aal). If you have an allergic reaction to this oil, you can develop a rash. Because most people are allergic to this oil, ...

Rhododendron is a well-known evergreen shrub native to eastern and southeastern North America. It bears rose to white colored ...

According to the American Academy of Dermatology Association, you should do the following: Immediately wash the part of your ...

Choose from 28,825 Oak Leaf stock illustrations from iStock. Find high-quality royalty-free vector images that you won't find anywhere else.

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This object is one of over 700 items ...