[shroomboy]

That probably rules out P. marcescibilis which has spores of up to 13 x 7 um, one of the many forms of P. prona may be a possibility, which has longer and wider spores 14 x 8 um. It certainly isn't P. candolleana on this occasion, that we can be clear about.

Unfortunately without a decent monograph to the genus, at your disposal, it is very difficult to pin a lot of these 'Psath's' down.

Andy