Orchids are the largest and most diverse
the flowering plant families, with over 800 described genera and 25,000 species. Some sources give 30,000 species, but the exact number is unknown since classification differs greatly
the academic world. Revisions of different genera occur
a monthly basis and this will increase
the growing use
genetic research and biochemistry. More than 100,000 hybrids and cultivars, produced
horticulturists, have been created
the introduction of tropical species
the 19th century. The Kew "World Checklist of Orchids" includes about 24,000 accepted species. About 800 new species are added each year. Orchids, along
grasses, are considered examples
the most advanced (derived) floral evolution through their interactions
pollinators and their symbiosis
orchid mycorrhizal fungi.
Source: http://en.wikipedia.org/wiki/Orchids
