Nioli (Niaouli) Latin name: Melaleuca viridiflora Family: Myrtaceae Slightly sweet, clear and piercing. Niauli- It is a large tree that grows abundantly in Australia. Its lush foliage and yellow flowers are also a familiar sight on the South Sea island of New Caledonia. The healthy air and absence of malaria in these regions is attributed to this tree. Fallen leaves appear to cover the soil and act as a powerful disinfectant. The French use it as a powerful antiseptic in obstretric wards of hospitals. It is a popular ingredient in many pharmaceutical preparations such as toothpastes and mouthwashes. Effect on skin: Tightens tissues.