Improve recall while driving down memory lane with orange, lemon and ylang ylang. Orange (Citrus sinensis) - This brought scent soothes and calms, encouraging happy thoughts and fond memories. Lemon (Citrus limonum) - The light, uplifting scent of this oil has been known to cause many to sing aloud their favorite love song. Ylang Ylang (Cananga odotata var. genuina) - Bring to mind dreamlike thoughts of passion and romance with the sweet aroma from the "flower of flowers."