OPENAIRE OpenAire Datacite unspecified Single and mean δ15N, δ13C, δ2H values, enrichment factors ε15N, ε13C, ε2H and total nitrogen concentration data of adult green leaves of 7 Orchidaceae species, fully mycoheterotrophic protocorms of 5 Orchidaceae species and 15 autotrophic reference plant species (n = 105). NE Bavaria Epipactis palustris Orchis militaris carbon (C) orchid seedlings hydrogen (H) stable isotopes orchid mycorrhiza Dactylorhiza majalis Ophrys insectifera mycoheterotrophy Platanthera bifolia Gymnadenia conopsea Neottia ovata Germany rhizoctonia fungi Schweiger, Julienne Marie-Isabelle, Bidartondo, Martin I., Gebauer, Gerhard, 2018-01-01 Single and mean δ15N, δ13C, δ2H values, enrichment factors ε15N, ε13C, ε2H and total nitrogen concentration data of adult green leaves of 7 Orchidaceae species, fully mycoheterotrophic protocorms of 5 Orchidaceae species and 15 autotrophic reference plant species (n = 105). Stable isotope abundance and nitrogen concentration data of adult orchids, orchid seedlings and autotrophic references. 10.5061/dryad.h1123/1 dataset https://doi.org/10.5061/dryad.h1123/1