Rhododendron indicum is an azalea Rhododendron species native to Japan. Among the species in this genus lie the largest flowering azaleas.

Tsutsusi are characterised by the presence of terminal buds that contain both floral and vegetative shoots. Many also have flattened multicellular ferrugineous (rust-coloured) hairs, which can cover the leaves and stems providing a coppery appearance, or pseudoverticillate leaves that are rhombic in shape. However some have hairs confined to the axils, or base of floral buds.

Source: Wikipedia