“The diffusion to America of African plants is of equal importance and I have dealt with this in considerable detail in my book They Came Before Columbus. Briefly, botanists have found that an African diploid cotton (G. herbaceum) crossed with a wild New World cotton several thousands years ago (3,500 B.C.) to form the New World tetraploid cottons (G. hirsutum and G. barbadense). They have also found that a jackbean (canavalia sp.) grew from an early marriage between African and New World beans. Karl Schwerin, an anthropologist attached to the University of New Mexico, has presented the case for this with great force. He also holds that a species of yam (dioscorea cayennensis) which has its original home in West Africa, was the plant ajes cited by early Spanish explorers to America.”

Source: Dr. Ivan Van Sertima. Blacks In Science: Ancient and Modern. pg. 21-22. 1983.

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