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cotyledon
Cotyledons are food storage structures for the embryo. As the food is used up the cotyledons shrivel and fall off. Dicots have two cotyledons and moncots have one.
This is a seedling of a Milkweed.
The white arrows are pointing to the cotyledons. The true leaves of the Polka Dot Plant develope the spots.
The blue arrows are pointing to the cotyledons of Iresine "Purple Lady". The true leaves are the reddish colored ones.
The large yellow cotyledons of a cucumber seedling.
This is a seedling of a Locust tree growing next to a Begonia.
 
 
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