A common cold germ asking the father of a neurasthenia bacillus if he can marry her; he is refused on account of the social gap between them. Pen drawing by C. Harrison, 1913.

Meiosis in an oocyte

Venus flytrap pollen grains, SEM

Peony pollen

Canterbury bell pollen

Meiotic spindle and chromosomes

Sweetpea pollen

Pollen grains, Agapanthus, SEM

Impatiens pollen

Lily pollen

Pollen grain, common morning glory (Ipomoea purpurea)

Cyclamen pollen

Blue anemone flower pollen grain, SEM

Carthamus pollen

Developing pollen grains in a Chrysanthemum flower bud, LM

Marigold pollen

Lissianthus pollen

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