Sarcocephalus diderrichii De Wild. Nauclea trillesii Merr. Sarcocephalus badi Aubrév. Sarcocephalus trillesii Pierre ex A.Chev.
Nauclea diderrichii is a species of tree of the genus Nauclea in the family Rubiaceae. It is known by the common names bilinga, aloma, badi, kusia and opepe.
The timber is known as bilinga, or Aloma in Germany and opepe in the UK. It is hard, dense and resistant to fungi and insects, and is used in joinery, flooring and marine construction.[4][5][6]