Came up in a session recently. Elves are immune only to MAGIC sleep, right? We had some plants using a spore based sleep effect. None of the players or the PFS GM new if this applied or not. It was an Ex based sleep effect.
Extraordinary Abilities (Ex): Extraordinary abilities are nonmagical. They are, however, not something that just anyone can do or even learn to do without extensive training. Effects or areas that suppress or negate magic have no effect on extraordinary abilities.