The plumule is that part of the embryo above the cotyledons, from which develops the shoot proper, consisting of stem, leaves, and flowers. It may vary much in size and development. If much food be stored, either in cotyledons or endosperm, the plumule may be small.
On the other hand if little food be provided, the plant must early shift for itself, and so the plumule may have several well-formed leaves, wanting only exposure to light to become a self supporting plant.
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