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On the cover: Cultivated sorghum is thought to have been domesticated in eastern Africa 3 000 to 6 000 years ago. The picture on the cover depicts dried panicles of cultivated (left, Sorghum bicolor subsp. bicolor, race caudatum) and wild (right, S. bicolor subsp. arundinaceum, race verticilliflorum) sorghums. These field specimens were grown in Ithaca, NY (summer of 2003) page S-29. Photo by Alexandra M. Casa.