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As you can see the flower is supported and nourished by the stem. Above it is the receptacle, this supports and nourishes the other parts of the flower. The flower is protected while it is in bud by the sepals, these may be coloured green or have the colour of the petals. These are brightly coloured to attract the insects. The flower may also have nectaries which provide food to the visiting insects. Inside the petals are the stamens, these are the male part of the flower. Each stamen consists of an anther and a filament. The anther produces the pollen, the filement raises the anther up in the flower. This enables the visiting insects to rub against it and so pick up the flowers pollen. In the centre of the flower is the female part, the carpel(s). Each carpel consists of stigma, style and ovary. The insects rub against the sticky stigma and so the pollen on the stigma then can grow down through the style and into the ovary where fertilisation takes place.