The golden yellow variant of Lilium amabile is believed to be a recessive mutant of the type. It is reported that this species first appeared in Holland from wild collected seed. Yellow forms crossed amongst the group will continue producing yellows. Lilium amabile luteum as well as its type were used by Jan de Graaff in producing his 'Fiesta Hybrids', registered in 1946, which in turn led to his world famous 'Mid-Century Hybrids', with 'Enchantment' probably being the best known.
Photo inset is the Asiatic Hybrid 'Ignacio' bred by the late Don Egger, selected and introduced by B & D Lilies in the late 1990's.