The flower parts:
Flower part Part function
Petal Petals are used to attract insects into the flower, they may have guidelines on them and be scented.
Stigma  Is covered in a sticky substance that the pollen grains will adhere to.
Style  The style raises the stigma away from the Ovary to decrease the likelihood of pollen contamination. It varies in length.
Ovary  This protects the ovule and once fertilisation has taken place it will become the fruit.
Ovule  The Ovule is like the egg in animals and once fertilisation has taken place will become the seed.
Receptacle  This is the flower’s attachment to the stalk and in some cases becomes part of the fruit after fertilisation e.g. strawberry.
Flower stalk  Gives support to the flower and elevates the flower for the insects.
Nectary  This is where a sugary solution called nectar is held to attract insects.
Sepal  Sepals protect the flower whilst the flower is developing from a bud.
Filament  This is the stalk of the Anther.
Anther  The Anthers contain pollen sacs. The sacs release pollen on to the outside of the anthers that brush against insects on entering the flowers. The pollen once deposited on the insect is transferred to the stigma of another flower or the same flower. The ovule is then able to be fertilised.
Please note:
The stigma, style, ovary, and ovule are often known collectively as the carpel or female parts of the flower.

FLOWER PARTS OCCUR IN WHORLS IN THE FOLLOWING ORDER- SEPALS, PETALS, STAMENS, PISTILS
PEDICEL - flower stem
RECEPTACLE - base of flower where other parts attach
SEPALS - small and green, collectively called the CALYX
PETALS - often large and showy, collectively called the COROLLA
PERIANTH - CALYX + COROLLA
STAMEN - composed of filament and anther
ANTHER - structure containing pollen grains
FILAMENT - structure connecting anther to receptacle
ANDROECIUM - collective term for stamens
CARPEL - structure enclosing ovules
PLACENTA - place of attachment of ovule(s) within ovary
STIGMA - receptive surface for pollen
STYLE - structure connecting ovary and stigma
OVARY - basal postion of pistil where ovules are located
The ovary develops into the fruit and contains ovules (eggs) which develop into seeds after fertilization.
LOCULE/CELL - chamber containg ovules
PISTIL - Collective term for carpel(s)
THE TERMS CARPEL AND PISTIL ARE EQUIVALENT WHEN THERE IS NO FUSION, IF FUSION OCCURS THEN YOU HAVE 2 OR MORE CARPELS UNITED INTO ONE PISTIL.
GYNOECIUM - collective term for pistils, a gynoecium can be composed of:
1. A single carpel = simple pistil
2. Two or more fused carpels = compound pistil
3. Two or more unfused carpels = two or more simple pistils
To determine the number of carpels in a compound pistil, count the locules, points of placentation, styles, stigma lobes, and ovary lobes.
COMPLETE FLOWER - A flower having all four whorls
PERFECT FLOWER - A flower having both sexes
UNISEXUAL FLOWER - A flower having one sex
MONOECIOUS PLANTS - A plant with unisexual flowers with both sexes on the same plant
DIOECIOUS PLANTS - A plant with unisexual flowers with one sex on each plant, in effect, male and female plants.