Abstract
In the present paper, I propose three new combinations in Guarianthe as a result of finding previously ignored binomials and correct misinterpretation of the articles on hybrid names of the International Code of Nomenclature. The correct names for the species and nothospecies up to now known as Guarianthe patinii and Guarianthe ×guatemalensis are, respectively, Guarianthe hennisiana and Guarianthe ×laelioides. The infraspecific combination Guarianthe ×laelioides f. pachecoi is proposed for Cattleya pachecoi. Finally I propose lectotypes for several names.