For this study 17.000-20.000 specimens were scrutinized of Mueller's material (Monographie, 1857, revised 1868). The number of genera here distinguished remained the same (6), but the number of species was a bit less (60). Among the many additions and changes necessary, some species were scrapped, also new ones established, the limits of some genera and of many species were improved or amended, some names were revised, new keys to genera and species were compiled. All species were illustrated in detail.Aspects of the family Resedaceae sensu lato discussed, were morphology, taxonomy, geography, biology and econonics. Genera were treated alphabetically, and selected references were added. All conclusions were explained and for each genus a key to species was made. Each species was described, and references, characteristics, geographic distribution, a number of selected herbarium specimens and synonyms were listed. An explanation was given for any synonymy. Notes on each species relate to nomenclature, history of the species, life cycle or ecological features and, so far as known, its importance to man.