A conservative estimate of over ten thousand coalesced thalli of Riccia cavernosa at Maudlin Pond near Chichester is probably the most important ephemeral site in southern England. The pond which is only rain filled has no entry or exit drainage ditches. This year we have had an extremely dry summer in this part of Sussex and the pond is now entirely dry, which is only an occasional happening.
Published: 1 November 2009
