A flower is the reproductive organ of a plant.
Flower come in many forms and colours, but all have similar parts.
Although it doesn't look like any real flower, you can see all the parts much more clearly. The receptacle is a swollen part of the end of the stem, and holds all the other parts of the flower. The sepals are modified leaves that protect the flower when it is a bud. The petals are often brightly-coloured to attract insects for pollination and usually have nectaries at the base which hold nectar as an incentive and reward for the insects. The male parts of the flower are the stamens which are filaments holding up anthers whose job is to make pollen grains , containing the male cells.