When visiting urban parks in south Wales it's worth keeping an eye out for yellow-green patches of Hennediella on trampled ground. I have only found Hennediella stanfordensis so far in Wales: a couple of times on footpaths near Caldicot and quite frequently on the Wye, Usk and their tributaries. However, in Chichester (where I am today) there's a lot of H. macrophylla in the parks. It is similar to a large Barbula unguiculata but the leaf shape is more oval (rather than parallel-sided) and a lens reveals a few teeth near the leaf apex. Hennediella look more opaque than, for example, Tortula truncata or T. acaulon.