Taxonomic Revision Of Riccia (Ricciaceae, Marchantiophyta) In The Monsoon Tropics Of The Northern Territory, Australia

The genus Riccia L. in the monsoon tropics of the Northern Territory north of the 18 degrees S latitude is revised. Sixteen species are described in detail, including four new species (R. abdita Cargill, R. chrysocrinita Cargill, R. obchantiana Cargill and R. verrucosa Cargill), with accompanying images and line drawings. A key to the species and distribution maps are provided.