Parts of a Flower

PA Standards

4- Parts of a Flower

a) Stamens

1- Male reproductive organs

Stamens

Stamens

2) Have two parts

Filament

Anther

Filament- stalk

Anther-where pollen is made

Pollen released into the air

Pollen grain forming on anther

StamenFlower Parts

Flower Parts

Anthers

Flower Parts

Filament

4- Parts of a Flower

b) Pistils

1- Female reproductive organs

Pistil

2) Pistils have three parts

Ovary – produces ovules (female gametes)

Style – short stalk

Stigma – sticky extension of stalk that catches pollen.

Pistil parts

Pistil ovary Ovules growing in the ovary

Pistil StigmasPollen sticking to the pistil’s stigma.

Flower PartsPistil

Flower Parts Stigma

Style

Ovary

Sepals & Petals

C) Sepals- Leaflike parts that protect the flower.

d) Petals – Attract pollinators.

Flower Parts

Sepal

Petal

How does pollen get from the stamen to the pistil?

Humans can also selectively pollinate flowers: Taking pollen

from one plant with a certain trait and placing it on a plant with a different trait.

For example, taking pollen from a short plant and placing it on a plant that is tall.

Cross pollination

Seed & Fruit Production

a) After pollen lands on stigma a tube grows down the style to an ovule.

Seed & Fruit Production

b) The fertilized zygote develops into a seed.

Seed & Fruit Production

c) The ovary that surrounds the ovules develops into a fruit.

Seed & Fruit Production

c) The ovary that surrounds the

ovules develops into a fruit (if the fruit dries out it becomes a shell).

Produces nuts, grainsAcorns, etc.

Tomato flower develops into fruit.

.

Flower Parts

Sepal

Petal

STAMENPISTIL

Stigma

Style

Anther

Ovary

Filament

Flower Parts

Sepal

Petal

StamenPistil

Stigma

Style

Anther

Ovary

Filament

Flower Parts