Identification notes

Unlike many of our species of Riccia, R. crystallina can be quite large, with rosettes growing to 2-3 cm in diameter. They are often much smaller though.

It can be surprisingly abundant, forming dense concentrations of hundreds or even thousands of rosettes in a small area. It is sometimes also a member of an interesting bryophyte community which may also include Sphaerocarpos michelii and Bryum gemmilucens.

Distribution in Great Britain and Ireland

R. crystallina is spreading eastwards and, while still a rarity, can be encountered unexpectedly where there has been plenty of disturbance to maintain bare ground. Think campsites, car parks and places where people have picnics and BBQs.