Rhododendron calendulaceum (Michx.) Torrey [ Azalea calendulacea Michx.]
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Rhododendron calendulaceum (Michx.) Torrey var. cupraea
[Azalea calendulacea Michx. var. cupraea] [Ericaceae]
C.L. Loddiges, Bot. Cab., vol. 14 : t. 1394 (1827) [?]