Continuing the recent garden bryo theme...the pale green moss in the photo below turned up in a planter in our garden a couple of years ago. I didn't get around to taking a sample, and soon after the stems collapsed and the plant died.
The colour is a pretty good likeness to how it appeared in life, so I think it must be Pohlia wahlenbergii - but I'd appreciate confirmation, if possible, as I've not seen this moss elsewhere in urban Cardiff. As the photo below shows, it was growing in a soggy, neglected planter (with no drainage). The only close associate was Bryum capillare.