A begonia blossom is monoecious , mean it contains both manful ( staminate ) and distaff ( carpellate ) parts . efflorescence from begonia belong to a class of industrial plant called angiosperms . It ’s in the efflorescence of a flora where intimate reproduction in angiosperms takes place . Because angiosperms have reduced male parts and few female persona , it takes less prison term between the operation of pollination and fecundation .
The Stamen
The stamen , which organize the male reproductive social unit , consists of the anther and the strand . unremarkably the anther has two lobe . The anther is where pollen grains are produce . Pollen is a coarse powder that contains the microgametophyte of semen plants . These microgametophyte grow the male sperm cells known as gametes .
When an anther is unseasoned , it consists of a build - up of undifferentiated , thin , walled cells close in by an epidermis . As the anther matures , it grow into four lobes with the lobe joined by a sterile tissue paper forebode the connective . Within each lobe is an elongate bedchamber cognise as a pollen sac .
The Pistil
The female reproductive building block , known as the pistil , consist of three basic parts . The basal swollen-headed part is called the ovary . The stylus is the cylindrical , narrow extension of the pistil . At the tip of the style is the stigma , which is a terminal receptive magnetic disc . The ovule starts developing as a tiny intumescency on the placenta , forming a stocky electric cell pile called the nucellus . As ontogeny and development continues , the nucellus is elevated on the funiculus , which is a short , stem - corresponding structure . As the ovules further modernise , protective layers grow from the the base of the nucellus called chalaza , which border the nucellus ( except for the narrow-minded possible action , address the micropyle ) . This opening is used as an entry for a pollen thermionic tube into the ovule .
Petals and Sepals
Petals are the bright - colored circumstances of a flower surrounding the stamen and pistil . consider the collector’s item of a prime , petals attract not only humans , but also insects and birds . Sepals , which are commonly green , typically lie below the petals and are leafage - like . Sepals serve as a temporary protective cover for an unopened peak . When a flower ’s petal are quick to blossom forth , sepals will turn up back . grant to the website Science.Jrank.org , wild flower begonias – which are not related to work begonias – lack flower petal . Although wildflower begonia do n’t have petals , their colorful sepals look like petal . What ’s more , plant breeding of begonias has acquire numerous showy blossom begonia varieties .
