Botanisches Zentralblatt; referierendes Organ für das Gesamtgebiet der Botanik - Association internationale des botanistes. (G. Fischer [etc.], 1895)

Bulletin of miscellaneous information - Royal Botanic Gardens, Kew. (H.M. Stationery Office, 1895)

Flora of tropical Africa - Oliver, Daniel, 1830 -1916 (L. Reeve and co, 1902)

Flora of tropical Africa - Oliver, Daniel, 1830 -1916 (L. Reeve and co, 1902)

Flora of tropical Africa - Oliver, Daniel, 1830 -1916 (L. Reeve and co, 1902)

Index Kewensis Supplement twenty one Names of seed-bearing plants at the rank of family and below published between January 1996 and the end of 2000 with some omissions from earlier years - Royal Botanic Gardens, Kew. (Royal Botanic Gardens, Kew)

Index Kewensis. names of seed-bearing plants at the rank of family and below published between January 1976 and the end of 1980 with some omissions from earlier years Supplement seventeen - Royal Botanic Gardens, Kew. (Clarendon Press)

Notizblatt des Königl. Botanischen Gartens und Museums zu Berlin - Engler, Adolf, 1844 -1930 (In Commission bei Wilhelm Engelmann, 1906)