Liberian high forest trees a systematic botanical study of the 75 most important or frequent high forest trees, with reference to numerous related species von Voorhoeve, Alexander G.

A Monograph of the genus Adenia forsk (Passifloraceae) von Wilde, Willem J. J. O. de 1936-

Cicer L., a monograph of the genus, with special reference to the chickpea Cicer arietinum L., its ecology and cultivation von Maesen, Laurentius J. G. van der 1944-

The Loganiaceae of Africa von Leeuwenberg, Antony J. M.