write about the all parts and their of function in bisexual flowers??
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Answer:
STRUCTURE OF BISEXUAL FLOWER - DEFINITION
concept
A flower which contains both male and female reproductive organs is called as a bisexual flower.
The male reproductive organ is called as an androecium and the female reproductive organ is called as a gynoecium.
A bisexual flower consists of calyx, corolla, stamens and carpel.
A unit of calyx is called as a sepal. Sepals are green in colour and are present just above the stalk of the flower.
A unit of corolla is called as a petal. Petals have different colours and are present above the sepals.
Androecium is the male reproductive part of the flower and is also called as a stemen. Stamen is made up of an anther and a filament.
Gynoecium is the female reproductive part of the flower and is also called as a carpel. The parts of the carpel are style, stigma and ovary.
BRACT - DEFINITION
A bract is a modified leaf on the stalk of the flower.
It appears different from the foliage leaf.
The flower having a bract is known as bractate flower and the flower without a bract is known as an ebractate flower.
NECTARIES - DEFINITION
Nectaries are the specialized nectar secreting glands inside the flower.
They help to attract insects during pollination.
PERIANTH - DEFINITION
When there is no distinction of sepals and petals, the nonessential floral organs are collectively called as perianth.
For example, Asphodelus.
FLOWER - DEFINITION
A flower is an organ of sexual reproduction in plants.
It is reproductive part of the plant.
The flower which has both male and female on the same plant is unisexual and the one which has both male and female on the different plant is a bisexual plant.
COMPLETE AND INCOMPLETE FLOWERS - DEFINITION
On the basis of structure, flowers are classified into two groups complete and incomplete.
Complete flowers
If a flower possesses whole parts such as petals, stamens, pistils and sepals, is called as complete e.g., rose.
Incomplete flower
A flower lack one or more parts of four flower parts of the complete flower is called as incomplete flowers e.g., begonia.
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