Which genus, Vanda and Epidendrum, has morespecies ?
Vanda: Vanda is a genus in the orchid family (Orchidaceae), which although not massive (about 80 species), is one of the genera more commonly found in the marketplace. Epidendrum: Epidendrum , abbreviated Epi in the horticultural trade, is a large neotropical genus of the orchid family. Epidendrum:  With more than 1,500 species, some authors describe it as a mega-genus.
Epidendrum