Rostellularia procumbens

Rostellularia procumbens, commonly known as water willow (करंबल, पित्तपापडा, कलमाशी, கோடகசாலை), is a small flowering plant native to the Indian subcontinent, Indochina, China, Peninsular Malaysia, Sumatra, Java, Sulawesi, the Philippines, Japan, and Korea. It is found in higher elevations, commonly in humid areas.

The leaves' juice can be squeezed in the eyes in cases of ophthalmia.