One exception is Ylang-ylang (Cananga odorata), which takes 22 hours to complete distillation. Less important food were fruits of Ylang-ylang ("Cananga odorata"), "Syzygium", and "Vitex cofassus". "Cananga odorata" is a fast-growing tree of the custard apple family Annonaceae. One exception is "ylang-ylang" ("Cananga odorata") which is purifed through a fractional distillation. One of its species, "Cananga odorata", is important as the source of the perfume ylang-ylang.