Vaccinium bracteatum

Vaccinium bracteatum, the sea bilberry or Asiatic bilberry, is a species of "Vaccinium" native to Japan, the Ryukyu Islands, Korea, southeast and south central China, Hainan, Taiwan, mainland Southeast Asia, Java, and Sumatra. It is a small tree or large shrub, with dark purple edible fruit. It is in semi-cultivation in China. Local people collect and consume the fruit, and in addition extract a bluish-violet dye from the leaves, which is used as a hair dye, for coloring vinegar, and in cooking. The dye turns black when cooked with rice, providing culinary interest.
Varieties.
The following varieties are currently accepted: