Inspired by Barry's and Sam's recent posts, I took my first tentative steps into arable bryophytes yesterday lunchtime, when I took a trip to the nearest arable fields to my house in my lunch hour. These are at Radyr, Cardiff (ST1279) and only 3 km from home.
I've still a pile of material to go through but species identified so far include Phascum cuspidatum var cuspidatum, Ephemerum minutissimum (spores checked) and lots of crystalworts. Most were Riccia sorocarpa but there was also a second, less glaucous species, see photos below. I thought this might be R. subbifurca rather than R. glauca, based on the small size of the thallus branches (only just over 1mm wide), but I'm really not sure.
Any thoughts? Thanks again.