Abstract. Delforge, P. & Viglione, J.- The Ophrys of the Durance, Ophrys druentica sp. nova [Natural. belges 87 (Orchid. 19) (2006): 121-140]. The Ophrys fuciflora complex in South-East of France comprises 3 species groups among which the O. tetraloniae species group is the more species-rich, with 8 named species, O. aegirtica, O. brachyotes, O. elatior, O. gresivaudanica, O. linearis, O. philippi, O. santonica, and O. vetula. Personnal field research carried out in France has shown that a ninth species, rather late- and large-flowering, with labellum mainly fucifloroid, is generally distributed in the Durance basin and locally abundant. As it coexists with O. aegirtica in the peripheral western zone of its range (i.e. mainly the low Durance valley and the Rhone valley in the Vaucluse department), it has been mistaken for it till now. It is newly described here as Ophrys druentica P. Delforge & Viglione. A detailed diagnosis is provided as well as a list of 39 localities prospected during the last 8 years.

Key-Words: Orchidaceae; Ophrys tetraloniae species group, Ophrys druentica sp. nova; flora of France, departments Alpes-de-Haute-Provence (04), Hautes-Alpes (05), Bouches‑du-Rh™ne (13), Dr™me (26), Var (83), Vaucluse (84).