Cytisine is also found in other plants; it is particularly characteristic of species in the genus Cytisus. Among the incompletely studied species, the most promising for exploitation is Cytisus austriacus L., found in Ukraine, Moldova, Crimea, and the North Caucasus. Its leaves contain about 0.5% alkaloids, including 0.2% cytisine, while its seeds have a higher concentration of cytisine (around 0.5%).
Alkaloids of this group have also been found in species belonging to the genera Genista, Crotalaria, Spartium, Sarothamnus, and in cultivated Lupinus. They are not yet used in medicine.