Azalea (Rhododendron spp.) are evergreen or deciduous flowering shrubs which are a commonly planted ornamental worldwide. There are over 800 species of Rhododendron spp., all with flowers of various colors and are bell-shaped or funnel-shaped. The showy flowers display large, spectacular blooms ranging in colors of red, pink, white, and yellow.
All parts of Rhododendrom spp contain highly toxic diterpene grayanotoxins.