[1] His major work was the Flore de l'Afrique du Nord in 16 volumes published posthumously in 1953.
He collected plants from Algeria, Morocco, France, and Mali for the herbarium of the National Botanic Garden of Belgium.
[4] After obtaining his PhD in 1905, he was a professor of botany at the Faculty of Sciences in Algiers starting in 1911 where he specialised in phytopathology.
Among species he named or renamed are: He also erected the family Paxillaceae, noting its affinities with boletes, in 1902, based on anatomical similarities.
[5] This was confirmed many years later by molecular studies firmly placing the genera Paxillus and Gyrodon at the base of the clade containing the members of the genus Boletus.