Onye njikwa ukwu nke Ruiwo gara French Institute of Botany maka nkwukọrịta na ọmụmụ ihe. France anọwo n'ọkwa kachasị elu nke nyocha ihe ọkụkụ oge niile, juputara na ahụmịhe na nsonaazụ nyocha.