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Rhododendron prinophyllum, the early azalea, [1] is a rhododendron species native to the eastern and southern United States. It is a deciduous shrub that grows 4 to 8 feet in height. Flowers are pink.
Rhododendron (/ ˌ r oʊ d ə ˈ d ɛ n d r ən /; pl.: rhododendra) is a very large genus of about 1,024 species of woody plants and in the heath family (Ericaceae). They can be either evergreen or deciduous.
Rhododendron caucasicum, the Caucasian rhododendron or the Georgian snow rose, is a species of flowering plant in the genus Rhododendron native to the Transcaucasus and Anatolia. [2] Its hybrid cultivar 'Christmas Cheer' has gained the Royal Horticultural Society 's Award of Garden Merit .
Rhododendron cumberlandense, the Cumberland rhododendron or Cumberland azalea, is a species of flowering plant in the family Ericaceae. [2] It is native to the southeastern United States. [1] A deciduous shrub with red flowers reaching 6 ft (1.8 m), it is typically found growing on the Cumberland Plateau. [2] [3]
Rhododendron catawbiense, with common names Catawba rosebay, [2] Catawba rhododendron, [3] mountain rosebay, [3] purple ivy, [3] purple laurel, [3] purple rhododendron, [3] red laurel, [3] rosebay, [3] rosebay laurel, [3] is a species of Rhododendron native to the eastern United States, growing mainly in the southern Appalachian Mountains from West Virginia south to northern Alabama.
Two subgenera are generally known to gardeners as "Azaleas", and include many fewer true species: Pentanthera, which comprises the deciduous azaleas, and Tsutsusi, which includes evergreen azaleas. [3] Modern cladistic analysis, based on nuclear genetics, proposes changes in the classification of species within subgenera.