xx Rhododendron luteum Sweet [ Azalea pontica L.]
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Rhododendron luteum C.K.Schneid. var. hybridum
[Azalea pontica L. var. hybridum] [Ericaceae]
J. Lindley, Edwards’s Bot. Reg., vol. 18 : t. 1559 (1832) [S.A. Drake]