pollen -
the fine spores that contain male gametes and that are borne by an anther in a flowering plant
spore a small usually single-celled asexual reproductive body produced by many nonflowering plants and fungi and some bacteria and protozoans and that are capable of developing into a new individual without sexual fusion; "a sexual spore is formed after the fusion of gametes"
pollinium a coherent mass of pollen grains (as in orchids)
Pollen is a fine to coarse powder containing the microgametophytes of seed plants, which produce the male gametes (sperm cells). Pollen grains have a hard coat that protects the sperm cells during the process of their movement between the stamens to the pistil of flowering plants or from the male cone to the female cone of coniferous plants. When pollen lands on a compatible pistil of flowering plants, it germinates and produces a pollen tube that transfers the sperm to the ovule of a receptive ovary.
OmegaWiki Dictionary
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pollen A fine granular substance produced in flowers. Collective term for pollen grains or microspores produced in the anthers of flowering plants.
