Niger flora : or, an enumeration of the plants of western tropical Africa,
collected by the late Dr. Theodore Vogel, ....... including Spicilegia Gorgonea, by P.B. Webb, and flora Nigritiana, by J.D. Hooker and George Bentham, with a sketch of the life of Dr. Vogel. Edited by W.J. Hooker
Bok Engelsk 1849