Crépin was born in Rochefort, Belgium. The genus Crepinella (Araliaceae) is named after him. As a taxonomist he circumscribed numerous plants within the genus Rosa.[1] He died in Brussels.
Les Characées de Belgique, 1863 – Characeae native to Belgium.
La nomenclature botanique au congrès international de botanique de Paris, 1867 – Botanical nomenclature of the International Congress of Botany of Paris.
Description de deux roses et observations sur la classification du genre Rosa, 1868.
Manuel de la flore de Belgique, (fifth edition 1884) – Manual of Belgian flora.[6]