Abstract: OBJECTIVE To correct the origins of legal medicinal plants, which have problem due to the genus names' synonyms, identification of genus, identification and consolidation of species, confusion of Chinese names. METHODS Chinese crude drug standards of state, various provinces and autonomous regions were searched. Taxonomic books were also retrieved. Origins with problem were studied from classification system, species identification and so on. RESULTS In Chinese crude drug standards of state and various provinces and autonomous regions, there were 86 species and 3 varieties belong to 12 families which from Casuarinaceae to Urticaceae, including 54 species and 2 varieties with no problem, 2 species' Latin names with troubles due to the genus names' synonyms, 1 specie with troubles about consolidation of genus, 9 species with troubles due to the identification and consolidation of species, 20 species and 1 variety with confusion of Chinese names. CONCLUSION 31 species and 1 variety were researched clearly, 1 species were worth to study further.