The giants of the Rhododendron family grow as tall as trees and are hugely impressive.
Rhododendron arboreum
Tree rhododendron, Tree azalea
Rhododendron arboreum subsp. cinnamomeum
Cinnanomum rhododendron, Tree rhododendron
Rhododendron arboreum subsp. delavayi
Delavay's rhododendron, Tree rhododendron
Rhododendron sinogrande
Tree rhododendron