Pollen is produced when a plant goes through sexual reproduction. If you want to find pollen in a plant try checking the microsporangiate cones or pollen cones or even male cones. Another explanation is that the stamen is the pollen producing part of of a flower but in the stamen you have the anther were the pollen is actually produced in the stamen.
For additional information on pollen.
Everysingle little grain in pollen contains vegetative cells. In flowering plants the vegetative tube cell produces the pollen tube, and the generative cell divides to form the two sperm cells.
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