Notes on American Loganiaceae I. Revision of Plocosperma Benth.

The delimitation of the Loganiaceae has been discussed very often since the family was first described, several genera having been added or removed at various times. The African representatives of the Loganiaceae are being revised by the present author. The study of extra-African genera appeared to be necessary for a better understanding of the relationships of the African taxa, in order to arrive at a decision about their taxonomic position.