From the top: Rhododendron alabamense (white flowers); Rhododendron austrinum (orange flowers); Rhododendron periclymenoides (pink flowers)
They're in the Coastal Plain section along the road at the bottom of the Collection, and you can see all these without getting out of your car. I got out though. They're all fragrant and today was cool and windy, not the best weather for smelling. I wanted to get my nose into the flowers.