Have you heard about ant plants?  In the wild, ant plants live in "partnership" with ant colonies, providing food and shelter.  Upon maturation, the plant normally has a caudex, or large bulbous shape, at the base.  This variety has shiny, pillowy leaves that have deep maroon undersides.  And no, this plant doesn't need ants to survive, and - even better - won't attract ants.

Monolena primuliflora "Midnight Glory" (Ant Plant) (6")