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Longitudinal section of a male cone of Pinus

Legend:

1  microsporophyll
2  microsporangium containing pollen grains

English name: Pine
Scientific name: Pinus sp.
Familia: Pinaceae
Classis: Coniferopsida
Phylum: Gymnospermae
Regnum: Plantae

In the microsporangium microsporocytes undergo meiosis, giving rise to microspore that divide mitotically and form pollen grains