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Nectar

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A nectary is floral tissue found in different locations in the flower. The different types of floral nectaries include sepal nectaries, petal nectaries, staminal nectaries found on the stamen, and gynoecial nectaries found on the ovary tissue. The nectaries also may vary in color, number, and symmetry. Nectaries can also be categorized as structural or non-structural. Structural nectaries refer to specific areas of tissue that exude nectar, such as the types of floral nectaries previously listed. Non-structural nectaries secrete nectar infrequently from non-differentiated tissues. The different types of floral nectaries coevolved depending on the pollinator that feeds on the plant's nectar. Nectar is secreted from epidermal cells of the nectaries by means of trichomes or modified stomata. The nectar comes from phloem with additional sugars that are secreted from the cells through vesicles packaged by the endoplasmic reticulum. Flowers that have longer nectaries sometimes have a vascular strand in the nectary to assist in transport over a longer distance. .

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