His contributions to Australian botany are commemorated in the name of the Australian plant genus Guichenotia. Guichenault Point, a promontory on Peron Peninsula in Shark Bay, was named after him. Guichenot is the more commonly used spelling of his name, and widely adopted by botanists; but Guichenault is used in François Péron's journal of the Baudin expedition, and hence for the place named after him.