Catasetum orchid 'Frilly Doris' (Catasetum sp.).
There are over 100 species in this most interesting genus of deciduous orchid plants. The Catasetum orchids are confined chiefly to Central America. The flowers are among the most remarkable in the orchid family. Apart from the wonderful structure, the male and female flowers, which differ both in structure and color. More orchid flowers at the Orchid Page.
If you want more information about this flower, just search the plant's Latin (botanical) name on Google: