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Biantheridion undulifolium (was Jamesoniella undulifolia), Marsh Flapwort, growing through Sphagnum rubellum.
Photographed by Des Callaghan during a survey of a site in mid-Wales. It seems quite fussy about which species of Sphagnum it grows through, and was predominantly found with S. rubellum at this site.
Published: 1 December 2021