Hydnocarpus is a genus of flowering plants belonging to the family Achariaceae. These plants are primarily found in tropical regions of Asia, particularly in countries like India and Indonesia. They are known for their large, leathery leaves and small, yellowish flowers that grow in clusters. The seeds of some Hydnocarpus species are notable for their oil content, which has been used in traditional medicine and as a source of hydnocarpic acid. This acid has potential applications in treating skin diseases and other health issues, making Hydnocarpus an important plant in both ecological and medicinal contexts.