Antoine Guichenot or Guichenault (1783–1867) was "gardener's boy" on the 1801—1804 French scientific voyage to Australia under Nicolas Baudin, and the 1817 voyage under Louis de Freycinet.
Very little is known about him, but the records of Baudin's voyage, together with annotations on surviving plant specimens collected by him, suggest that he was poorly educated, with atrocious spelling and little knowledge of botany, yet worked extremely hard, collecting more plant specimens than the officially appointed botanist, Jean Baptiste Leschenault de la Tour, and, despite his poor literacy, labelling them with much more useful annotations.