Action Plan: River Jelly Lichen

River jelly lichen (Collema dichotomum) is an aquatic lichen grows on submerged rocks in intermediate and upland fast-flowing streams. It is rare in the UK and has been declining since 1960, and is now known only from eleven 10 km squares in mid-Wales, northern England, Scotland and Northern Ireland. The river jelly lichen is protected under Schedule 8 of the Wildlife and Countryside Act 1981 and is listed as vulnerable on both the International Union for the Conservation of Nature and Natural Resources (IUCN) and British red lists.