4-Botany-Plant-Vascular-Angiosperm-Flower-Parts-Stamen

stamen

Flowers have anthers on structures {stamen}|.

4-Botany-Plant-Vascular-Angiosperm-Flower-Parts-Stamen-Anther

anther

Flowers can have male sex organs {anther}| {antheridia} to make male sex cells, which make pollen sacs on stamens.

microsporangia

Anther sacs {microsporangia} develop male sex cells into microspores.

microspore

Microsporangia develop male sex cells into four spores {microspore}. Two microspores are tube nuclei. Two microspores are generative nuclei. One tube nucleus and one generative nucleus make one pollen grain, so process makes two pollen grains.

pollen

One tube nucleus and one generative nucleus make one grain {pollen grain} {pollen}|. Pollen grains leave stamens to try to land on stigmas.

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Date Modified: 2022.0225