The white flowered group includes six species. Rhododendron alabamense, R. arborescens, R. atlanticum, and R. viscosum. The white group also includes a newly discovered species from South Carolina, R. eastmanii , as well as R. occidentale from the west coast. Although the flowers in this group are primarily white, there are occasional forms that are pale pink or tinged with pink. The Pink Group All of the species in the pink group bloom in early spring, usually before the leaves have fully expanded.
Flowers can range from pale pink, to deep rose, to almost cherry red.
The flowers of the species in the orange group can range from yellow, through gold, to deep orange or scarlet. The five species in this group include R. austrinum, R. calendulaceum, R. cumberlandense, R. flammeum, and R. prunifolium .