Rhododendron (from Ancient Greek ῥόδον rhódon "rose" and δένδρον déndron "tree") is a genus of over 1000 species of woody plants in the heath family, either evergreen or deciduous. Most species have showy flowers.
Azaleas make up two subgenera of Rhododendron. The flowers of some hydrangeas can appear similar to those of some rhododendrons, but Hydrangea is in a different order.
The rhododendron is the national flower of Nepal.
Read more about Rhododendron: Description, Cultivation