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  2. Pollen - Wikipedia

    en.wikipedia.org/wiki/Pollen

    Pollen itself is not the male gamete. [4] It is a gametophyte, something that could be considered an entire organism, which then produces the male gamete.Each pollen grain contains vegetative (non-reproductive) cells (only a single cell in most flowering plants but several in other seed plants) and a generative (reproductive) cell.

  3. Hibiscus - Wikipedia

    en.wikipedia.org/wiki/Hibiscus

    The leaves are alternate, ovate to lanceolate [7], often with a toothed or lobed margin . The flowers are large, conspicuous [8], trumpet-shaped, with five or more petals, colour from white to pink, red, blue, orange, peach, [9] yellow or purple, [10] and from 4–18 cm broad. Pollen grain Hibiscus flower

  4. Petal - Wikipedia

    en.wikipedia.org/wiki/Petal

    Pollination is an important step in the sexual reproduction of higher plants. Pollen is produced by the male flower or by the male organs of hermaphroditic flowers. Pollen does not move on its own and thus requires wind or animal pollinators to disperse the pollen to the stigma of the same or nearby flowers. However, pollinators are rather ...

  5. Conifer cone - Wikipedia

    en.wikipedia.org/wiki/Conifer_cone

    The male cone (microstrobilus or pollen cone) is structurally similar across all conifers, differing only in small ways (mostly in scale arrangement) from species to species. Extending out from a central axis are microsporophylls (modified leaves).

  6. List of pollen sources - Wikipedia

    en.wikipedia.org/wiki/List_of_pollen_sources

    The term pollen source is often used in the context of beekeeping and refers to flowering plants as a source of pollen for bees or other insects. Bees collect pollen as a protein source to raise their brood. For the plant, the pollinizer, this can be an important mechanism for sexual reproduction, as the pollinator distributes its

  7. Gynoecium - Wikipedia

    en.wikipedia.org/wiki/Gynoecium

    The central cell, once fertilized by a sperm cell from the pollen becomes the first cell of the endosperm, and the egg cell once fertilized become the zygote that develops into the embryo. The gap in the integuments through which the pollen tube enters to deliver sperm to the egg is called the micropyle. The stalk attaching the ovule to the ...

  8. Gymnosperm - Wikipedia

    en.wikipedia.org/wiki/Gymnosperm

    During pollination, pollen grains are physically transferred between plants from the pollen cone to the ovule. Pollen is usually moved by wind or insects. Whole grains enter each ovule through a microscopic gap in the ovule coat called the micropyle. The pollen grains mature further inside the ovule and produce sperm cells.

  9. Floral morphology - Wikipedia

    en.wikipedia.org/wiki/Floral_morphology

    The parts that make up the androecium are called stamens whose function is the generation of male gametophytes or pollen grains. The stamens are highly modified leaves formed by a foot that is inserted into the receptacle of the flower, called filament , and a distal portion called anther .