Eldritch_Lord
Adventurer
I guess I already think of psions as being that (they're spontaneous in all mechanical versions I've seen). The psionic wizard is a bizarre little thing called an erudite. The psion is already someone with access to untapped but highly intuitive power.
Spontaneity is irrelevant; all psionicists are "spontaneous" in a sense. Erudites are psions, just a variant version of them.