A Fau de Verzy is either a Dwarf Beech, a dwarf oak tree, or a dwarf chestnut tree. These grow in the forest of Verzy, 25 km south of Reims in France.
In this forest are less than a thousand dwarf beeches, some dozen dwarf oaks and some dwarf chestnuts, but this article speaks in the main about dwarf beeches.
Wikipedia https://en.wikipedia.org/wiki/Faux_de_Verzy
Coordinates 48°50'38.446" N 2°21'30.385" E