Polygala japonica is a species of flowering plant in the milkwort family (Polygalaceae). It is native to Northeast, East and Southeastern Asia, as well as eastern Australia. It is a wiry and decumbent dwarf shrub with a height between 10 and 25 centimetres (3.9 and 9.8 in). Its stems have tiny curled hairs. Its leaves are 5 to 20 millimetres (0.20 to 0.79 in) long and 3 to 10 millimetres (0.12 to 0.39 in) wide. Its flowers are purple to mauve and 5 to 6 millimetres (0.20 to 0.24 in) long. It flowers between October and December.

...