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Flower Anatomy
Flower Anatomy
“You may think of flowers as decorative
objects that brighten the world, but the
presence of so many flowers in the
world is visible evidence of something
else – the stunning evolutionary success
of angiosperms, or flowering plants.”
Flower Anatomy
Flowers are reproductive organs
that are composed of four kinds
of specialized leaves:
1. Sepals
2. Petals
3. Stamens
4. Carpel (sometimes called the Pistil)
Sepals
Sepals are the outermost
circle of floral parts.
A. often green and
resemble ordinary leaves
B. they protect the flower
while it is developing
Rose Buds
Petals
Petals are found just
inside the sepals
~ often brightly colored
~ attract insects and
other pollinators (and
people!) to the flower
Petals
Within the ring of petals are the
reproductive parts of the flower.
Reproductive Structures
Many flowers contain both male
and female reproductive parts!
~Male parts are the stamen.
~Female parts are the carpel.
Male Parts: Stamen
The stamen is composed
of 2 parts:
1. Filament: long stalk
that supports an anther.
2. Anther: tip of filament
where the pollen is
located.
Pollen is essentially the sperm of a flower so
it is located on the male part of the flower:
the stamen.
Female Parts: Carpel
The Carpel is composed
of 3 parts:
1. Ovary: base containing
the eggs of a plant
2. Style: the stalk
3. Stigma: a sticky top
used to capture pollen.
Plant Reproduction
Once the stigma of
the carpel
(female part) is
pollinated by
pollen (sperm),
seeds can be
made.
Plant Reproduction
Seeds can then be
spread by
animals or by
the wind to new
locations to
grow into new
plants!
Warm-Up 4/13!!!
The male parts of the flower are
known as:____________, the
female:___________
A. Stamen; Anther
B. Stamen; Carpel
C. Carpel; Stamen
D. Carpal; Anther
Warm-Up 4/13!!!
The male parts of the flower are
known as the:____________, the
female:___________
A. Stamen; Anther
B. Stamen; Carpel
C. Carpel; Stamen
D. Carpal; Anther
Plant Practice!
A plant’s vascular system carries
water (_________) and sugary sap
(___________)
A. Rhizoid, Xylem
B. Phloem; Xylem
C. Xylem; Rhizoid
D. Xlyem; Phloem
Plant Practice!
A plant’s vascular system carries
water (_________) and sugary sap
(___________)
A. Rhizoid, Xylem
B. Phloem; Xylem
C. Xylem; Rhizoid
D. Xylem; Phloem
Plant Practice!
Which of the four plant groups
protects its seeds in fruits?
A. Mosses
B. Ferns
C. Gymnosperms
D. Angiosperms
Plant Practice!
Which of the four plant groups
protects its seeds in fruits?
A. Mosses
B. Ferns
C. Gymnosperms
D. Angiosperms
Plant Practice!
What part of the carpel (female
part of the flower) turns into the
fruit?
A. Anthers
B. Ovary
C. Style
D. Stigma
Plant Practice!
What part of the carpel (female
part of the flower) turns into the
fruit?
A. Anthers
B. Ovary
C. Style
D. Stigma
Plant Practice!
What is the name of the protective
leaves that surround a developing
flower?
A. Sepals
B. Petals
C. Stamen
D. Carpel
Plant Practice!
What is the name of the protective
leaves that surround a developing
flower?
A. Sepals
B. Petals
C. Stamen
D. Carpel
Plant Practice!
What is the name of the cells that
open and close a plant’s stoma?
A. Sentinel Cells
B. Door cells
C. Entrance Cells
D. Guard Cells
Plant Practice!
What is the name of the cells that
open and close a plant’s stoma?
A. Sentinel Cells
B. Door cells
C. Entrance Cells
D. Guard Cells
Orange Tree Flowers
Pollinated Orange Flower