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. It is found throughout Asia. It has also been introduced to the Americas.
Ceylon's hound's tongue is similar in appearance to Cynoglossum lanceolatum, but has larger flowers that are 4âÂÂ5 mm across. The fruits are small, about 2 mm across.
It is native to Afghanistan, Pakistan, India, Nepal, Sri Lanka, Southeast Asia, China, Taiwan, Japan, and South Korea. It has been introduced to North America, the Caribbean, and South America. It occurs at altitudes of 1,200-4,100 m.