Sometimes called deciduous Azaleas these plants are more in the yellow/orange/red color range while the evergreen Rhododendrons are in the pink/purple range. Deciduous Rhododendrons are usually fragrant but the evergreen Rhododendrons are usually not fragrant. The bloom time is April and May.
Here are a few deciduous Rhododendrons at Dawn Gardens:
Rhododendron ‘Umpqua Queen’
Rhododendron ‘White Lights’
Rhododendron ‘Mt. St. Helens’