  Let $X$ be a smooth projective variety with a semisimple quantum cohomology.
It is known that the blowup $\operatorname{Bl}_{\rm pt}(X)$ of $X$ at one point
also has semisimple quantum cohomology. In particular, the monodromy group of
the quantum cohomology of $\operatorname{Bl}_{\rm pt}(X)$ is a reflectiongroup.
We found explicit formulas for certain generators of the monodromy group of the
quantum cohomology of $\operatorname{Bl}_{\rm pt}(X)$ depending only on the
geometry of the exceptional divisor.
