[Preliminary survey on medicinal plants of Polygonum in Gansu Province].

OBJECTIVE: To gain a clear idea on the resources of medicinal plants of Polygonum in Gansu. METHODS: Field investigation, specimen collection, taxonomic study, scientific names study and literature retrieval were carried out. RESULTS: The distribution, ecological environment and medicinal parts of 23 species and 7 varieties of Polygonum from Gansu have been clarified. CONCLUSION: The investigation may prove to be useful for the utility and further study of Polygonum in Gansu province.