On our way to the Sphenolobopsis we searched the ravine downstream - where Plagiochila bifaria was present in a classic mist-zone location - and some south-facing cliffs where putative Ctenidium molluscum var robustum (or perhaps var condensatum) grew close to var molluscum and looked convincingly different (if un-nameable). Nearby there was some Dicranum montanum on a log.
Then we reached Sgwd yr Eira, with its classic walk-behind waterfall and extensive mist zone. Most Ash trunks were plastered with algae - too humid for anything else perhaps - but eventually we found some Plagiochila exigua at the base of an Ash. Unlike the small Lejeuneaceae this species lacks propagules, so it's a sure-fire indicator of long-term Atlantic bryophyte richness in the valley.
Happy with our lot we continued upstream in the fading light, where a yapa (Bolivian word for an added bonus) came in the form of Hygrobiella laxifolia on a riverside rock shelf. The godfather of south Wales bryology HH Knight found this species in "Hepste Glen" in the early 20th century, but nobody had seen it since. This was a fitting end to an outstanding final day of our Coedydd Nedd a Mellte survey!