"Niger flora, or, An enumeration of the plants of Western Tropical Africa. including Spicilegia Gorgonea. Flora Nigritiana. A sketch of the life of Dr. Vogel / collected by the late Dr. Theodore Vogel, ; ed. by Sir W. J. Hooker, by P. B. Webb, ; by Dr. J. D. Hooker, and George Bentham, [Edition de 1849]"