Orchids are a flowers with a diverse plant family, with about 800 genera and some 28,000 individual species. There are about 22 different kinds of orchids that are commonly used as house plants. The different type of orchids are: Miltonia, Psychopsis, Cattleya, Phalaenopsis, Cymbidium, Brassia, Vanda, Maxillaria, Encyclia, Phaius, Oncidium, Paphiopedilum, Ludisia, Epidendrum Odontoglossum, Phragmipedium, Zygopetalum, Paphiopedilum, Catasetum, Lycaste, Vanilla, Brassavola.