Bauhinia is a genus of many more species this genus. This genus contains the species related to Cestrum tomentosum.
Cestrum is a genus of - depending on authority - 150-250 species of flowering plants in the family Solanaceae. 
Bauhinia is a genus of more than 500 species of flowering plants in the subfamily Cercidoideae of the large flowering plant family Fabaceae, with a pantropical distribution. 
Cestrum diurnum (Din Ka Raja) is a species of "Cestrum", native to the West Indies. 
Cestrum tomentosum is a plant in the genus "Cestrum" that ranges throughout central and South America. 
