Tuber
Fleshy roots or stems which also act as food storage for the plant. New plants are formed from buds or eyes on the tuber. Potatoes, including sweet potatoes, are a good example of a plant that reproduces using tubers. Interestingly, potatoes also use stolons, at the ends of which are the new tubers (discoveryexpress).
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Crown
The crown is the top part of the tuber that was once connected to the base of the old stem. To identify this region, look for sprouting buds or where the tuber appears to have once been connected to a stem. This will help you identify which way is up and down.
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"Eyes"(Axillary bud)
The eyes of the tuber are where new buds begin to grow.
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