Abstract. Delforge, P.- New natural hybrids of European Orchids [Natural. belges 78 (Orchid. 10) (1997): 177-188]. Description of 2 Epipactis hybrids from France: Epipactis ×gerbaudiorum (E. provincialis× E. tremolsii) and Epipactis ×gevaudanii (E. helleborine ×E. rhodanensis), of 6 Ophrys and one Serapias hybrids from Greece: Ophrys ×deheyniana (O. bremifera×O. thesei), Ophrys ×dessartiana (O. astypalaeica ×O. parosica), Ophrys ×ettlingeriana (O. argolica × O. attica), Ophrys ×mahilloniana (O. aeoli × O.  ferrum-equinum), Ophrys ×quintartiana (O. ariadnae × O. ferrum-equinum), Ophrys ×saintenoy-simoniana (O. ferrum-equinum × O. thesei), and Serapias ×walravensiana (S. carica × S. lingua), and of 2 Ophrys hybrids from Sardinia: Ophrys ×pesseiae (O. morisii × O. panattensis) and Ophrys ×spanui (O. annae × O. tenthredinifera), with a new combination for Ophrys ×daissiorum.

Key-Words: Orchidacea, genus Epipactis, genus Ophrys, genus Serapias, natural interspecific hybrids, Epipactis ×gerbaudiorum nothosp. nat. nov., Epipactis ×gevaudanii nothosp. nat. nov., Ophrys ×daissiorum comb. et stat. nov., Ophrys ×deheyniana nothosp. nat. nov., Ophrys ×dessartiana nothosp. nat. nov., Ophrys ×ettlingerana nothosp. nat. nov., Ophrys ×mahilloniana nothosp. nat. nov., Ophrys ×pesseiae nothosp. nat. nov., Ophrys ×quintartiana nothosp. nat. nov., Ophrys ×saintenoy-simoniana nothosp. nat. nov., Ophrys ×spanui nothosp. nat. nov., Serapias ×walravensiana nothosp. nat. nov. Flora of France, Greece, Italy, Sardinia.