microgametophyte
male gametophyte resulting from the development of a microspore
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
microgametophyte Stage of the plant life cycle that develops from or within a microspore. The microgametophyte produces sperm in specialized structures known as antheridia.
microgametophyte
Pollen grains.
micromere
Any of the small blastomeres formed at the animal pole of a developing egg. These eventually give rise to the ectoderm.
Pollen grains (from the greek palynos for dust or pollen) contain the male gametophyte (microgametophyte) phase of the plant.
In most other plants the gametophyte is very small (as in ferns) or even reduced as in flowering plants (angiosperms), where the female form (ovule) is known as a megagametophyte and the male form (pollen) is called a microgametophyte.
 See also: Gametophyte, Spore, Sporophyte, Flower, Ovule
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