Which Ethnic Group Did America Get Yams And Okra?

Which Ethnic Group Did America Get Yams And Okra? Food crops of African origin that made their way to the New World included yams, okra, hibiscus, tamarind, Guinea millet, watermelon, sorghum, and the oil palm. Other plants, like bananas, are of Asian origin but reached the Americas via Africa. Who brought yams to America? After