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 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