This article is a draft about botany.
You can share your knowledge by improving it (how?) according to the recommendations of the corresponding projects. Ovary of Fallopia convolvulus during fertilization: fu funicule, cha chalaze, nu nucelle, mi micropyle, ii integument integument, ie external integument, e embryonic sac, ek nucleus of the embryonic sac, ei oosphere, an antipodes, g style, n stigma , p pollen grains, ps pollen tubes (48 ×).
The pollen tube is a tube emitted by a grain of pollen after germination that allows it to drive male gametes to the egg. We talk about siphonogamy: water is no longer necessary for (internal) fertilization.
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