Pleurothallis niveo-globula
 

I'm a little embarrassed to be posting this - the plant is pretty small and hasn't really gotten going yet, but I had the camera out...
Very easy grower, makes a great specimen. This came from Orchids Limited here in MN. Growing in the terrarium.

This one doesn't open much at all. No idea how it manages to get pollinated! As a small plant, it's cute - usually in bloom. As a nice big specimen, it's REALLY cute - nice Philodendron-like leaves and those tiny white spherical blooms all over. Makes a specimen pretty quickly.

It's a cutie!