Objective: To make clear the botanical origin of medicinal Uncaria distributed in China and the situation of its use in folk medicines.
Methods: Collecting data and making on-the-spot investigation.
Results: There are thirteen medicinal plants which belong to Uncaria genus, and ten of them are commercially available. A clear idea was obtained of their geographical distribution, distribution features and practical experiences in folk application.
Conclusion: This investigation is helpful in further researching and exploring the resources of Uncaria for medical use, as well as provides a scientific basis for production, management and safe use of crude drugs.