Looks like Glaux maritima? AKA Lysimachia maritima (Sea Milkwort):
Works for me. Thanks!
Beautiful!! I've not ever seen it.
Beautiful it is. :-)
Interesting to find it in a sphagnum bog. I generally find it in a salt marsh or a dune/saltmarsh interface on a sandspit.
I suppose it is a bit of a mixed bag. There is certainly sphagnum substrate, and it is adjacent to a sandy beach on the sea-shore. Other species include Kalmia, Rhodora, crowberry, bakeapple, labrador tea. It is said to have grass pink and arethusa but they are not in evidence at present. :-)
Like Denis, I find it abundant on some local salt marsh / sand dune complexes along the coast here in s.e. NB but I've never seen it in any other habitat. Very popular with pollinators.