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Gr\"atzer and Lakser asked in the 1971 {\sl Transactions of the AmericanMathematical Society} if the pseudocomplemented distributive lattices in theamalgamation class of the subvariety generated by ${\bf 2}^n\oplus{\bf 1}$ canbe characterized by the property of not having a $*$-homomorphism onto ${\bf2}^i\oplus{\bf 1}$ for $1<i<n$.  In this article, this question is answered.  If you want to know the answer, you will have to read it (or skip to the lastsection).

On a Question of Gr\"atzer and Lakser from the 1971 {\sl Transactions of the American Mathematical Society}