Cynoglossum zeylanicum, also called the Ceylon hound's tongue, Ceylon forget-me-not, and Indian hound's tongue, is a species of flowering plant in the family Boraginaceae.

[1][2][3][4] Ceylon's hound's tongue is similar in appearance to Cynoglossum lanceolatum, but has larger flowers that are 4–5 mm across.

The fruits are small, about 2 mm across.

[5] It is native to Afghanistan, Pakistan, India, Nepal, Sri Lanka, Southeast Asia, China, Taiwan, Japan, and South Korea.

[1][6] It has been introduced to North America, the Caribbean, and South America.