xx Rhododendron nudiflorum Torr. [ Azalea nudiflora L.]
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Rhododendron nudiflorum Hook. var. thyrsifolia
[Azalea nudiflora L. var. thyrsifolia] [Ericaceae]
J. Lindley, Edwards’s Bot. Reg., vol. 16 : t. 1367 (1830) [M. Hart]