A flower also known as a blossom or bloom, is the part which is its reproductive part of the flowering plants (mainly the plants of the Magnoliophyta division, also called angiosperms). Today flowers bouquet is in trend for wishing someone on birthday, marriage anniversary and many more functions. So for this online flowers home delivery is a best option by using internet facility. The basic function of a flower is effective reproduction of plants, usually it provides a mechanism for the union of egg and pollen. Flowers also facilitate outcrossing which is just the fusion of pollen and eggs from different plant population or even allowing self-pollination (fusion of pollen and eggs belonging to the same flower). Some flowers can produce diaspores without parthenocarpy or fertilization. Flowers also contain sporangia which are the place where gametophytes develops itself. Flowers also give rise to seeds and fruits, many flowers have even evolved to be attractive to organisms, so it cause them to be responsible for the transfer of pollen.
Flowers not only facilitates the reproduction of plants with flowers, they have been admired for a long time and humans use them to beautify their surroundings and as gifts on an occasion, and flowers are considered as objects of feelings like romance, friendship even in ritual, religion, medicine flowers are used and it’s also used as source of food. The main parts of a flower are mainly these two parts: the vegetative or floral part, which consists of petals and other associated parts in the perianth, which is the reproductive or sexual parts. In this internet world you can buy flowers online very easily for decoration and well wishing for your love. A typical flower consists of four kinds of structures which are attached to the tip of a short stalk. Each of these of parts are arranged in a whorl on the receptacle. The four main whorls (if we start from the base of the flower or lowest node and work upwards) are as follows:
- Perianth or Vegetative part
Collectively the calyx and corolla form the vegetative part or perianth
Calyx: the outermost whorl consists of units which are called sepals; these are mainly green in color and it encloses the rest of the flower when it is in the bud stage, however, they can also be absent or prominent and have petals-like in some species.
Corolla: the next whorl which is situated toward the apex, composed of units which are called petals, they are typically thin, soft and colored so to attract animals which can help in the process of pollination.
- Reproductive or sexual part
Reproductive parts contains of the two maintained below
Androecium (derived from Greek word andros oikia: man’s house): the next whorl after corolla (sometimes it multiplies into several whorls), consists of units called stamens. Stamens mainly consist of two parts: a stalk which is called a filament, topped by an anther where pollen is produced by meiosis and it is eventually dispersed by animals and organisms.
Gynoecium (from Greek word gynaikos oikia: aka woman’s house): the innermost whorl of a flower, it consists of one or more units which are known as carpels. The carpel or multiple fused carpels form a hollow structure which is called an ovary, it produces ovules internally. Ovules are megasporangia which produce megaspores by meiosis which then develops into female gametophytes. These produces egg cells, the gynoecium of a flower can also be described by the use of an alternative terminology where the part which sees in the innermost whorl (consists an ovary, style and stigma) is called a pistil. A pistil consists of a single carpel or multiple carpels which are fused together. The tip of the pistil, the stigma which is sticky, is the receptor of pollen. The stalk, the style are supportive and it becomes the pathway for pollen tubes to bloom from pollen grains which stick to the stigma. The relationship to the gynoecium on the receptacle is called as hypogynous (which is beneath a superior ovary), perigynous (surrounds a superior ovary), or epigynous (which is above inferior ovary).