We consider two types of
uniform algebras A on the closure Ω of a domain Ω ⊂Rn: those generated by finitely
many smooth functions and those consisting of solutions to Lu = 0 where L is a
smooth complex vector field on Ω. Under certain conditions we prove the existence of
one of two types of analytic structure in the maximal ideal space MA of
such an algebra: local foliations of Ω by complex manifolds on which the
functions in the algebra are holomorphic, or foliations of a subset of MA∖Ω by
analytic disks. Some open questions suggested by this line of inquiry are
discussed.