INDEX• 1. DEFINITION OF FLOWERING PLANTS• 2.DEFINITION OF ANGIOSPERMS• 3.1.EXAMPLES OF ANGIOSPERMS• 3.2.SOME PHOTOS AND NAMES• 4.1DIFFERENT ORGANS OF ANGIOSPERM

FLOWERS• 4.2.EXPLANATION OF THE ORGANS • 5.REPRODUCTION OF ANGIOSPERM FLOWERS• 6.FRUITS AND SEEDS• 7.DISPERSION OF SEEDS

DEFINITION OF FLOWERING PLANTS

Flowering plants are spermatophytes: they use

seeds to reproduce . The seeds are produced by

specialised structures called flowers .

Orange flower

DEFINITION OF ANGIOSPERMFlowering plants can be angiosperms. They are

any flowering plant in which the ovules are

enclosed in an ovary, which develops into the

fruit after fertilization.

Olive flowers

EXAMPLES OF ANGIOSPERMS

These are the most modern plants : they first

appeared about 150 million years ago .

Angiosperms include herbaceous (non-woody)

plants, and trees and shrubs.

There are 300 families : holm oaks, corn, orange

trees,olive trees ,rosemary, pepper plants and

poplar trees.

SOME PHOTOS AND NAMES

Rosemary

Corn

Holm oak

DIFFERENT ORGANS OF ANGIOSPERMFLOWERS

Angiosperm flowers can have up to 4 different

types of organs: sepals, petals, stamens and

carpels.

EXPLANATION OF THE ORGANS

PETALS

These are the coloured leaves that attract

insects carrying pollen. All the petals are called

the corolla

corolla

STAMENS

These are the male reproductive organs of the

flower. They have a filament with an anther at

the end : the anther produces the pollen grains .

Stamens are protected by the corolla.

STAMENS

CARPELS (PISTILS)

These are the female reproductive organs of a

plant. A carpel includes the ovary, the style and

the stigma. Inside the ovary are the ovules,

which contain the female reproductive cells.

SEPALS

These are leaves below the petals . They are

usually small and green . All the sepals are called

calyx : the calyx protects the internal parts of

the flower.

SEPALS

REPRODUCTION OF ANGIOSPERMFLOWERS

A complete flower is a flower that has all of 4

types of organs. But not all flowers are

complete: male flowers only have stamens and

female flowers only have carpels. A

hermaphrodite is a flower that has stamens

and carpels.

Angiosperms produce structures that come from the flowers ovary, called fruits. Their function is to disperse the seeds they have inside and protect them.

Remains of the style, stamens and clyx that cover the

interior of the fruit.

Seeds that the ovaries have produced.

Stamens

Sepals (calyx)

Fruits and Seeds

There are two types of fruit:

-Freshly fruit, that have a jucy pulp, such as tomatoes or peaches.-Dry fruit , that have a stony and rigid fruit wall, such as the sunflower seeds or nuts.

Inside, their structure is rigid.

Inside, it has a juicy pulp with lots of water.

DISPERSION OF SEEDS

The seeds can be dispersed by many ways:

-By the wind.

-By the water.

-By birds or other animals.

The animals take the seeds in formof fruit in this case, except insects.