OverviewOleander (Nerium oleander) is a common ornamental evergreen shrub. It is used as a freeway median divider in warmer states, such as California. This plant is extremely toxic, and a single leaf may kill an adult. This photograph shows oleander not yet in bloom.
Update Date 10/21/2013
Updated by: Jacob L. Heller, MD, MHA, Emergency Medicine, Virginia Mason Medical Center, Seattle, Washington. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.