The origin of the African flora: an inaugural lecture given in the University College of Rhodesia and Nyasaland

As with all scientific investigations, the study of the Origin of the African Flora requires first an examination of the terms and difficulties which beset the subject, before the real problems emerge. The most obvious obtrusion is that the continent of Africa contains not one but several floras, and perhaps the final word in the title of this address should have been pluralized. There are, however, more complex questions than this to be resolved.

An inaugural lecture on botanical species of Africa.