Orchids are the most evolved vascular plants family and one of the most diverse in the plant kingdom with around 25000 wild species organised in about 800 genera. The  family is distributed worldwide except for the poles and the dessert regions, being  particularly abundant in tropical areas.


In the Nuevo Catálogo de la Flora Vascular de Venezuela, Carnevali records 213 genera and about 1800 species belonging to the Orchidaceae family. Ninety-five of them are endangered species according to the criteria of the International Union for Conservation of Nature (IUCN) listed in El Libro Rojo de la Flora  Venezolana (1ª ed.).