Polygala siberica Linn. Polygaleae.
Temperate and tropical Asia. The roots and tender leaves were eaten in China in the fourteenth century.
Polygala theezan Linn.
Java and Japan. The Japanese and Javanese use the leaves as tea.
Polygala vulgaris Linn. Milkwort.
Europe and Asia Minor. This plant is said to be used in adulterating green tea.