Bulbophyllum
Bulbophyllum is the largest genus in the orchid family Orchidaceae. With more than 2,000 species, it is also one of the largest genera of flowering plants, exceeded only by Astragalus. This genus is abbreviated in the trade journals as Bulb. It is found throughout most of the warmer parts of the world: Africa, southern Asia, Latin America, the West Indies, and various islands in the Indian and Pacific Oceans.
The scientific name has been derived from the Latin word bulbus (bulb-like) and the Greek word phyllon (leaf), referring to the pseudobulbs on top of which the leaf is growing. (Wikipedia)
Bulbophyllum pseudopicturatum

#10: Bulbophyllum pseudopicturatum at the Serres d'Auteuil, Paris, France.
Bulbophyllum retusiusculum

#15: Bulbophyllum retusiusculum Photo by Christian Aparecido Demetrio 11/03/2013.
Bulbophyllum acuminatum

#19: Bulbophyllum acuminatum The Tapering Bulbophyllum is native to Sumatra, Borneo and Malaysia. Photo from Tenom Orchid Center, Sabah, Borneo.
Bulbophyllum phalaenopsis

#20: Bulbophyllum phalaenopsis trophy winning plant at 2005 NY International Orchid Show.