&i;and Addenda to Dresslerella, Platystele and Porroglossum (Orchidaceae)&o; is a little known genus of orchids - little known because the species are rare and seldom seen in nature or in collections. 15 years were needed to assemble the illustrations of almost every known species. All but two are illustrated. All species are described and of the total 64 species, 32 are described as new, doubling the known size of the genus.