[in French with Esperanto and English abstracts] Detailed description of five species novae and one species newly found in France, saxicolous–calcifugous, belonging to the Lecanora polytropa group: Lecanora crassiuscula Cl. Roux, Poumarat et M. Bertrand sp. nov., L. crozensis Cl. Roux et S. Poumarat sp. nov., L. hyperpolytropa Cl. Roux et M. Bertrand, L. intricatoides M. Bertrand et Cl. Roux sp. nov., L. polytropopsis Cl. Roux, M. Bertrand et Poumarat sp. nov., L. tolypodes Poelt et Vězda so far only known from one station in Switzerland. Identification key for the saxicolous Lecanora of the polytropa group from France. Lecanora vocontia (Clauzade et Cl. Roux) Cl. Roux et M. Bertrand comb. nov.