Ardisia (coralberry or marlberry) is a genus of flowering plants in the family Primulaceae. It was in the former Myrsinaceae family now recognised as the myrsine sub-family Myrsinoideae. They are distributed in the Americas, Asia, Australia, and the Pacific Islands, mainly in the tropics. There are 400 to 500 species. One species, Ardisia japonica (Chinese: 紫金牛; pinyin: zǐjīn niú) is one of the 50 fundamental herbs in traditional Chinese medicine.