Well I don't really know what's in there to be honest. I don't plan on adding anything else, as the Pogonia is supposed to form a colony after a few seasons.
Plants I can identify are:
- Some Polytrichum
- Sphagnum inundatum, denticulatum, palustre & cuspidatum
- Callitriche palustris
- Drosera intermedia
- Pogonia ophioglossoides
Light levels might not work in your favour here; all these plants thrive in full sun.
I'd recommend asking to the very knowledgeable and helpful people over here:
Swamp/bog plants – Vosse Rare Plants