Ansellia africana
 

It is the most common version of this species available here.
http://blog-imgs-114.fc2.com/p/h/e/pheli/DSC_6781.jpg

Nice! How are you growing this one?

I grow it with near full sun in the winter and 50% shade in the summer. I used to think it like drier medium than other orchids. But it you water them more in the hot days, the plant will grow well.