Dye - A purple to dull blue dye can be made from the fruit.
Bangladesh, Bhutan, China, India, Myanmar, Nepal
Temperate biome.

Perennial herb.
Woody, rooting at nodes, forming dense mats.
Large, evergreen, leathery, often with toothed margins.
Solitary, large, cup-shaped, often white or pink.
Rarely produced, small and insignificant.
Flowering: May - June.