His work includes the investigation on the parts associated with Oxalidaceae, Rutaceae, Burseraceae, Hamamelidaceae, Haloragaceae, Callitrichaceae, Rhizophoraceae, Mehistomaceae and Crypteroniaceae in " Flore g�n�rale de l'Indo-Chine " ( Flowers of Indo-China; 1910, 1911, 1912, 1920, 1921 ), " Arbres et arbrisseaux utiles ou ornementaux " ( Useful and Ornamental Trees and Shrubs; 1928 ) and " Les Fleurs de jardins " ( The Flowers for Gardens; 4 volumes, 1929 to 1936 ).
