A genus of thallose liverworts. M. polymorpha is a common species in Britain. It is immediately recognizable by the presence on the upper surface of symmetrical, cupshaped structures containing small discoid gemmae. The plant is particularly conspicuous when fertile; the male reproductive structures resemble miniature mushrooms, while the female structures are stalked with many radiating, spoke-like lobes at the top of the stalk. It is common in gardens, on paths, flowerpots, etc., and is also found on moors, heaths, river banks, etc.
Subjects: Plant Sciences and Forestry.