The precursor studies1) and floristic treatment of P.J. Eyma of the Guttiferae of Suriname2) exhibited a remarkably keen insight into the biology and taxonomy of this rather complicated family. Particularly this is true of the genus Clusia, which is the concern of this paper, and for which even yet the overall biology is indeed too little known. In the Flora of Surinam (1.c.) Eyma admitted eleven species. Now, as a result of more field activity from which much new material has been derived, there can be credited to Suriname fourteen species, of which three have been collected in that country subsequent to the studies of Eyma. Name changes are required for two species.