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

Bulletin of miscellaneous information - Royal Botanic Gardens, Kew. (H.M. Stationery Office, 1896)

Catalogue of the African plants - British Museum (Natural History). Department of Botany. (Printed by order of the Trustees, 1896)

Catalogue of the African plants - British Museum (Natural History). Department of Botany. (Printed by order of the Trustees, 1896)

Catalogue of the African plants - British Museum (Natural History). Department of Botany. (Printed by order of the Trustees, 1896)

Catalogue of the African plants - British Museum (Natural History). Department of Botany. (Printed by order of the Trustees, 1901)

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

Just's Botanischer Jahresbericht - Just, Johann Leopold, 1841 -1891 (Gebruder Borntraeger, 1895)