LIZZIE HARPER / SCIENCE PHOTO LIBRARY LIZZIE HARPER / SCIENCE PHOTO LIBRARY
Yam (Dioscorea villosa). Watercolour artwork illustrating a yam. The tuber of the plant is edible but must be prepared and cooked thoroughly to remove toxins. Its consumption is common throughout West Africa. As it can be grown in harsh conditions and stored for several months, it is a valuable food source during times of food scarcity.
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