Particularités des ascocarpes et de l’hyménium des truffes (Ascomycètes) I. Développement et structure des ascocarpes

The ascocarp development is recorded in Tuber melanosporum Vitt. The chief characteristic points are: the primordium formation, the cup-like apothecioid “ébauche” (with arachnoid network growing from paraphyses) which gradually becomes globular and closed, comprising a scaly peridium and a voluminous gleba, the “dissociated” hymenium in mature ascocarps. Comparative data are provided concerning other Tuber species and other genera of truffles. Morphological and structural features of ascocarps are so diverse that it is impossible to arrange the group in order of growing complexity.