Wardia hygrometrica

Wardia is a monotypic genus of mosses in the subclass Dicranidae; it contains only the species Wardia hygrometrica, "an aquatic moss endemic to the Western Cape province of South Africa." It is the only endemic moss family in South Africa. As it is an aquatic moss, it was first classified in the Fontinalaceae (and in the order of Isobryales), but molecular studies have shown that it is more closely related to the Dicranaceae.