In vitro biological activities of South African Pelargonium (Geraniaceae) species

Despite commercial interest and ethnobotanical data, the pharmacological activities of a number of indigenous Pelargonium species hitherto remain poorly explored. The acetone extracts of twenty-one Pelargonium species (section Pelargonium) were included in this study. Using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay, potent anti-oxidant activity was observed for the crude extracts of P. betulinum and P. crispum (IC50 values of 4.13 ± 0.14...