Thai Patti Lemon is a unique citrus plant mainly grown for its highly aromatic leaves rather than the fruit. The plant is a small, thorny evergreen tree with characteristic double-lobed, glossy green leaves that are widely used in Thai cuisine for flavoring curries, soups, and stir-fried dishes.

The fruits are small, round, and dark green with a rough, bumpy rind. The juice is very sour and less commonly used compared to the leaves. The plant grows well in tropical climates with good sunlight and well-drained soil. Thai Patti Lemon is also valued for its medicinal and insect-repellent properties.