This is the Cubensis Flying Saucer Mushrooms (Soucoupe Volante in French) magic mushroom strain
 
It effects include vivid visual stimulation, intense feelings of euphoria, and deep introspection/philosophical thought.  These are often compared to the Penis Envy Mushroom.  Not much  is known of their lineage, but they are thought to be an Albino Penis Envy hybrid.  Regardless, they are a potent, and very sought after.  Fun, euphoric, and very visual!