Mentha aquatica.

Botanical name: 

Related entries: Peppermint - Spearmint - Pennyroyal

Mentha Aquatica.—Under the name of poco oil, the volatile oil of this plant, which is a native of China, is used in the Island of Java as a popular remedy for headache, and also in cholera.

The Dispensatory of the United States of America, 1918, was edited by Joseph P. Remington, Horatio C. Wood and others.