Male gametophyte of angiosperms/monocots is

The male gametophyte of angiosperms/monocots is Microspore.
Microspores are land plant spores that develop into male gametophytes, whereas megaspores develop into female gametophytes.
The male gametophyte gives rise to sperm cells, which are used for fertilization of an egg cell to form a zygote. Microspores are haploid and are produced from diploid microsporocytes by meiosis.
As the anther of a flowering plant (angiosperms) develops, four patches of tissue differentiate from the main mass of cells. These patches of tissue contain many diploid microsporocyte cells, each of which undergoes meiosis producing a quartet of microspores.