Reproduction
and........
Just in case you might want to know or are in need of a refresher :~)
The Stamens.
The stamens form the third whorl on the inside of the corolla. Each stamen is made up of a slender flexible filament which supports the anther at its end. The anther is the male reproductive organ in a flower.
Functions
* The anther produces pollen grains which contain the male reproductive cells;<
* The filament bears and supports the anther in the most suitable position for pollen transfer to take place.
The Pistils.
The pistil is the fourth and the innermost whorl of the flower. It consists of a basal, swollen portion, the ovary, from which a long and slender style arises. The stigma is found at the tip of the style. The pistil is the female reproductive organ.
Functions
* The ovary is a hollow cavity which contains the ovules.
* Each ovule contains an egg cell.
* The elongated style bears the stigma in the most suitable position for receiving pollen during pollination.
* The sticky stigma at the tip of the style can receive or trap the pollen grains.
The stamens and pistils usually occur in the same flower. These are essential whorls. A flower bearing both the essential whorls is bisexual. Sometimes a flower has only the stamens or only the pistils, in which case it is referred to as a unisexual flower (i.e. the flower bears only one of the essential organs).
The calyx and the corolla are referred to as the non-essential whorls , since they are not responsible for the formation of gametes and seeds. This formation can occur in the absence of the outer whorls.
A flower in which all four whorls are present is said to be a complete flower. If any one of the non-essential whorls is not present, the flower is incomplete.
Reproduction
and........
Just in case you might want to know or are in need of a refresher :~)
The Stamens.
The stamens form the third whorl on the inside of the corolla. Each stamen is made up of a slender flexible filament which supports the anther at its end. The anther is the male reproductive organ in a flower.
Functions
* The anther produces pollen grains which contain the male reproductive cells;<
* The filament bears and supports the anther in the most suitable position for pollen transfer to take place.
The Pistils.
The pistil is the fourth and the innermost whorl of the flower. It consists of a basal, swollen portion, the ovary, from which a long and slender style arises. The stigma is found at the tip of the style. The pistil is the female reproductive organ.
Functions
* The ovary is a hollow cavity which contains the ovules.
* Each ovule contains an egg cell.
* The elongated style bears the stigma in the most suitable position for receiving pollen during pollination.
* The sticky stigma at the tip of the style can receive or trap the pollen grains.
The stamens and pistils usually occur in the same flower. These are essential whorls. A flower bearing both the essential whorls is bisexual. Sometimes a flower has only the stamens or only the pistils, in which case it is referred to as a unisexual flower (i.e. the flower bears only one of the essential organs).
The calyx and the corolla are referred to as the non-essential whorls , since they are not responsible for the formation of gametes and seeds. This formation can occur in the absence of the outer whorls.
A flower in which all four whorls are present is said to be a complete flower. If any one of the non-essential whorls is not present, the flower is incomplete.