The characters used by Garay & Taylor and by Summerhayes to distinguish the genera Oeceoclades Lindl. and Eulophia Lindl. are discussed. These two widely distributed tropical genera each contain c. 20 species in Madagascar. Four new species of Oeceoclades are described and two new combinations are made. A new species of Eulophia is described and Eulophia galbana Ridl. is transferred to the Malagasy endemic genus Eulophiella Rolfe, which now includes five species.
Madagascar, Orchidaceae, Oeceoclades, Eulophia, Eulophiella