Claude Roux is a French lichenologist, mycologist and Esperantist.
He has co-authored books about the identification of lichens written in Esperanto.
From 1969 to 1975, Roux taught biology and geology in a secondary school.
From 1975 he worked at the Botany Laboratory of the CNRS Mediterranean Institute of Ecology and Paleoecology in Marseille, studying systematics, morphology and reproduction of lichens.
He is the honorary president of the French Lichenology Association (Association Française de Lichénologie)[4] Roux is the author or co-author of many books and scientific papers.