REFERENCES
- Arnell, S. (1952). Hepaticae collected in South and West Africa, 1951. New and little known species. Bog. Notiser, pp. 307–29.
- Arnell S. (1956). Hepaticae collected by O. Hedberg et al, on the East African mountains. Arkiv Botanik, 3, no. 16, 517–62.
- Duthie, A. V. & Gernide, S. (1936). Studies in South African Ricciaceae. I. The annual species: R. plants Taylor, R. cupulifera sp.nov., and R. Curtisii T. P. James. Trans. Roy. Soc. S. Afr. 24, 93–133.
- Duthie, A. V. & Gernide, S. (1939). Studies in South African Fticciaceae. II. The annual species (concluded): R. compacta sp.nov. and R. Rautcutenii Steph. Trans. Roy. Soc. S. Afr. 27, 17–28.
- Frye, T. C. & Clark, L. (1937). Hepaticae of North America. Seattle, U.S.A.
- Muumlller, K. (1954). Die Lebermoose Europas, 3rd ed., in Rabenhorst's Kryptogamenflora von Deutschland, Osterreich and der Schweiz.
- Pearson, W. H. (1921). Notes on a collection of Hepaticae from Belgian Congo (ex herb. R. Naveau, Antwerp). Proc. Biol. Sess. 20th In. Natuur-, Wis- en Geneeskundig Congres, August 1921, Mechlin, Belgium.