Bulbophyllum chitouense

This name is a synonym of Bulbophyllum griffithii

It is native to Assam (India), the eastern Himalayas. Bhutn, Sikkim, southern Bhina and Taiwan. 

It is a cool to cold growing species, light shade, drier in winter. 

Here is a link to Jay's Internet Orchid Species Encyclopedia with more information and some photos.