The investigation of the South African Senecio glutinosus afforded, in addition to known compounds, a new seco-furoeremophilane, an eremophilane and a derived seco-nor-eremophilane while alkaloids could not be detected. Senecio othonnaeflorus contained high concentrations of pyrrolizidine alkaloids but gave no sesquiterpenes. Senecio asperulus contains also pyrrolizidine alkaloids and in addition several known furocremophilones as well as some diterpenes. The structures were elucidated by high field 1H NMR spectroscopy. © 1989.