Cortinarius britannicus is a species of webcap. It is known only from Scotland, where it was found on clay soil among mosses under beech. The species produces small, purplish mushrooms. Along with five other British webcaps, C. britannicus was selected by Kew Gardens as a highlight of taxa described by the organisation's staff and affiliates in 2020.

Cortinarius scoticus is a little brown mushroom known from central and northern Europe, where it grows in pine forests. It was described in 2020, and named for Scotland, where it was first found. Along with five other British webcaps, C. scoticus was selected by Kew Gardens as a highlight of taxa described by the organisation's staff and affiliates in 2020.