Flower Structure | Parts and Function


Flowering plants are the dominant type of plants on the earth today (there are about 250000 species). Flowers are therefore the most common plant organs for sexual reproduction.
Flower Part Form and Function
Peduncle Flower stalk.
Receptacle Part of flower stalk bearing the floral organs, at base of flower.
Sepal Leaf-like structures at flower base, protects young flower bud.
Calyx All the sepals together form the calyx.
Petal Located in and above the sepals, often large and colourful, sometimes scented, sometimes producing nectar. Often serve to attract pollinators to the plant.
Corolla All the petals together form the corolla.
Stamen Male part of the flower, consisting of the anther and filament, makes pollen grains.
Filament The stalk of the stamen which bears the anther.
Anther The pollen bearing portion of a stamen.
Pollen Grains containing the male gametes. Immature male gametophyte with a protective outer covering.
CarpelPistil Female part of the flower. Consisting of the stigma, style and ovary.
Stigma Often sticky top of carpel, serves as a receptive surface for pollen grains.
Style The stalk of a carpel, between the stigma and the ovary, through which the pollen tube grows.
Ovary Enlarged base of the carpel containing the ovule or ovules. The ovary matures to become a fruit.
Ovule Located in the ovaries. Carries female gametes. Ovules become seeds on fertilization.