Oncidium Orchids & Alliances Oncidium is a large genus of orchids of over 700 species growing from southern Florida to Argentina. Our Oncidium Orchids & Alliances collection includes new intergeneric orchids. Intergeneric orchids consist of several different genera that can
be crossed together to create new "man made" intergeneric orchids like Cochlioda, Miltonia, Odontoglossum, Oncidium and Ada.