1. Neue Arten von Guinea, dem Kongo und dem Quango [New species from Guinea, the Kongo and the Kwango rivers];Büttner;Verhandlungen des Botanischen Vereins für die Provinz Brandenburg und die Angrenzenden Länder,1889
2. On some new species of Musci and Hepaticae in the herbarium of Sir W. J. Hooker, collected in tropical Africa, chiefly by the late Dr. Vogel and Mr. Barter;Mitten;Transactions of the Linnean Society of London,1860
3. On the Musci and Hepaticae from the Cameroon Mountains and from River Niger;Mitten;Botanical Journal of the Linnean Society,1863
4. The mosses and Hepaticae collected in Central Africa by the late Right Rev. James Hannington, Bishop of Mombasa, F.L.S., F.G.S., & c., with some others, including those gathered by Mr. H. H. Johnston on Kilimanjaro;Mitten;Journal of the Linnean Society, Botany,1886
5. Musci Schweinfurthiani in itineribus duobus in Africam Centralem per annos 1868–1871 collecti, determinati ex expositi [Determinations and descriptions of mosses collected by Schweinfurth in Central Africa during two travels in the years 1868–1871];Müller;Linnaea,1875