Synonyms
Hymenanthes macrophylla f. alba (Rehder) Benth.
Rhododendron macrophyllum f. album Rehder
Hymenanthes macrophylla (D.Don ex G.Don) H.F.Copel.
Azalea macrophylla (D.Don ex G.Don) Kuntze
Hymenanthes californica (Hook.) H.F.Copel.
Rhododendron californicum Hook.
Rhododendron washingtonianum Millais
Azalea californica (Hook.f.) Kuntze
Rhododendron californicum var. washingtonianum Zabel ex Rehder