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Plant Reproduction: Flowers, Spores, Seeds, Fruits; Sexual vs Asexual

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Figures (2)

An orchid flower
Flower heads showing disk and ray florets.

Key Points

  • Stamens often 10 with 9 fused and one free stamen; in Mimosoideae, stamens are numerous.
  • The terms CARPEL and PISTIL are equivalent when there is no fusion, if fusion occurs then you have 2 or more CARPELS united into one PISTIL.
  • Part of the transformation of an ovule into a seed is the transformation of the integuments (or part of the integuments) into a seed coat.
  • Inside the ovary are produced one too many ovules that even­ tually become seeds.
  • Pollination is the distribution of the whole male gametophytes which are called pollen grains.
  • A seed is the result of enforced control of the sporophyte over the gametophyte.

Terms

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