| |
| |
Encyclopedia |
 | | For this reason, and because of the complexity of the family, estimates of the number of orchid species vary from 15,000 to 25,000, and the number of genera from 400 to 800. |
 | | The family is placed in the order Orchidales with 3 smaller families—the Geosiridaceae, Burmanniaceae, and Corsiaceae—with a combined total of fewer than 150 species. |
 | | Orchids and their allies are distinguished from other orders of flowering plants by a combination of floral characteristics rather than by a single characteristic unique to the group. |
| www.historychannel.com /encyclopedia/article.jsp?link=FWNE.fw..or025400.a (647 words) |
|