1. Any shrub of the genus Rhododendron: evergreen shrubs or small shrubby trees having leathery leaves and showy clusters of campanulate (bell-shaped) flowers
   "The botanical garden's rhododendron collection was a riot of colour in spring"

Derived forms: rhododendrons

Type of: bush, shrub

Part of: genus Rhododendron

Encyclopedia: Rhododendron, Oregon