Utricularia mannii
mannii" is endemic to tropical Africa , particularly the islands in the Gulf of Guinea ( Bioko , São Tomé , and Príncipe ) and the adjacent mainland ( Cameroon and Nigeria ) . 
<triplet> Bioko <subj> Gulf of Guinea <obj> located in or next to body of water <triplet> São Tomé <subj> Gulf of Guinea <obj> located in or next to body of water <triplet> Cameroon <subj> Gulf of Guinea <obj> located in or next to body of water