Rhododendron calendulaceum (Michx.) Torrey [ Azalea calendulacea Michx.]
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Rhododendron calendulaceum (Michx.) Torrey var. stapletoniana
[Azalea calendulacea Michx. var. stapletoniana] [Ericaceae]
J. Lindley, Edwards’s Bot. Reg., vol. 17 : t. 1407 (1831) [M. Hart]