 He amassed a collection of 226 watercolor paintings of 3,226 different species of orchids which were presented to the "Phanerogamie" of the "Muséum national d'histoire naturelle" on 1947.Paul-Louis Simond died in Valence (Drôme, France) on 3 March 1947 at the age 88.After his death, a fellow biologist, René Dujarric de la Rivière, presented Simond's eulogy at the Academy of Medecine.