As successors of A.-P. de Candolle in Montpellier (France), M.-F. Dunal (1789– 1856) and A. Raffeneau-Delile (1778–1850) let a consequent unpublished iconography of fungi growing in this area. Investigations at the “Pôle Patrimoine scientifique” of the University Montpellier 2, based at the Institute of Botany, allowed the rediscovery and inventory of these forgotten collections. Ten species were published as new by É. Boudier, J. F. Lagarde and J. de Seynes based on these documents. Each of them is listed and lectotypified : Agaricus concolor Delile ex De Seynes, Ag. convivarum Dunal ex De Seynes, A. sulcatus Dunal ex De Seynes, Marasmius delilei De Seynes, Panaeolus regis De Seynes, Morchella dunalii Boud., Peziza atroviolacea Delile ex De Seynes, P. cynocopra Dunal ex De Seynes, P. viridifusca Delile ex De Seynes, and Plicaria planchonis Dunal ex Boud. Two varieties published by de Seynes are invalid : Agaricus sericeus var. infundibuliformis De Seynes et A. translucens var. squamulosus De Seynes. An epitype is designed for Ag. concolor. The following combinations are introduced : Tricholoma concolor (Delile ex De Seynes) P.-A. Moreau, J.-M. Bellanger et Courtec., T. concolor f. bisporum (Bon) P.-A. Moreau et Courtec., and Marasmiellus delilei (De Seynes) P.-A. Moreau et Courtec. (synonym of M. trabutii (Maire) Singer).