Four alkaloids, ligularizine, senkirkine and senecionine N-oxide, were isolated from S. gallicus. Apart from florosenine, a new alkaloid was isolated from S. adonidifolius and identified as 12,13,19-trihydroxy-15,20-epoxy-15,20-dihydro(12S,15R,20R senecionan-11,16-dione. Two dimensional spectroscopic correlation experiments (1H1H and 13C1H) were performed, permitting the unequivocal assignation of the 1H and 13C NMR spectra of the alkaloids and enabling us to correct some of the data appearing in the literature. © 1988.