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Kingdom: Plantae
Phylum: Coniferophyta
Pinus
ovulate cone. Note megasporocyte within the megasporangium.
Pinus
megasporangium with megasporocyte (or megaspore, if meiosis has already
occurred)
Pinus
staminate cone. Note multiple microsporangia with microspores (immature
pollen grains).
Pinus
microsporangia with microspores.
Pinus
microsporangium with microgametophytes.
Pinus
pollen. Mature microgametophyte.
Pinus
pollen. After germination.
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