1. GAMETOPHYTIC APOMIXIS AND EVOLUTION IN PLANTS
2. Apomixis in the angiosperms. II
3. B. E. Okoli(1979 ). Genetic studies in the Andropogon gayanus-A. tectorum (Gramineae) complex in Nigeria. Ph.D. thesis , University of Ife, Ile-Ife, Nigeria.
4. Meiotic Studies on Diploid Hybrids between Emilia sonchifolia and E. coccinea (Compositae)