Morphogenic responses can be of two types- organogenesis or embryogenesis. If your objective is to initiate shoots, then please try cytokinin either alone or in combinations and permutations. If your objective is to get somatic embryogenesis, then please try auxins especially 2,4-D either alone or in combinations with cytokinin (high concentration of auxin and lower concentration of cytokinin).
I'm not expert on that species, but I indicate the following paper (written by a good collegue): Sgarbi E., Grimaudo M. & Del Prete C., 2007 - In vitro
asymbioticgrowth of Mediterranean terrestrial orchids from immatureseeds.