Identification notes
A warmth-loving acrocarp that has only ever been found in one locality in Britain on the North Devon coast, although it is more common in parts of central and southern Europe and elsewhere. Fortunately, much of its sandstone habitat there is within a SSSI and its population appears to be reasonably stable.
It forms quite dense patches on rock and in the field, can be provisionally identified by its leaf margins, which are revolute, not simply recurved. Like D. rigidulus (which may grow with it) its primary means of asexual reproduction is via multicellular gemmae produced in leaf axils and these may be abundant.
