look, there are three different species, growing in a patch the size of a pea
the silvery one is Bryum argenteum
further on is some colorful Orthotrichum anomalum
and further on is some Schistidium rivulare
might as well post some more mosses from another wall in town
here is another Orthotrichum anomalum
here is Schistidium rivulare with more mature capsules
here is some Orthotrichum strangulatum
here is rivulare with strangulatum. i can't tell the leaves apart without a microscope!
here are two mosses who's names i don't know yet. maybe they'll sprout capsules in the summer and I'll look some more