1. Examining Parts of a Flower
Lesson 1
Examining Parts of a Flower

2. Terms Anther Anthesis Complete flower Dicot Fertilization Filament
Imperfect flower
Incomplete flower
Monocot
Ovaries
Ovule
Perfect flower
Petal
Photoperiodism
Phytochrome
Pistil
Pistillate flower

3. Terms cont. Pollen Pollination Sepal Stamen Staminate flower Stigma
Style
Vernalization

4. Parts of a Flower
Flower - reproductive part of flowering plants

5. Parts of a Flower cont…
Sepals - green-like structures beneath the petals; offer protection to developing bud
Sepal

6. Sepals

7. Parts of a Flower cont…
Petals - usually brightly colored; attract pollinators
Petal

8. Petals

9. Parts of a Flower cont… Stamens - male reproductive part of flower

10. Parts of a Flower cont…
Pistil - female reproductive part of the flower
Pistil

11. Pistil
The pistil contains the stigma, style, and ovary.

12. Reproductive Structures cont…
Pistil
Stigma - has sticky surface to capture pollen
Style - tube-like; connects stigma with the ovary
Ovary - contains the ovules

14. Reproductive Structures
Stamen
Anther - produces the pollen
Filament - stalk which supports the anther

15. Stamens The stamens produce pollen and are the male parts of a flower.
A stamen consists of a filament and anther, which is a knob-like structure at the end of a filament.

17. 2. Describe the types of flowers.
Type of flower is based on the parts found in the flower of a particular species.

18. Perfect vs. Imperfect
Parts of a flower determine if it is perfect or imperfect.
1. A perfect flower has the stamen and pistil in the same flower.
2. An imperfect flower lacks either stamens or pistils.

19. Complete vs. Incomplete
Parts of a flower determine if it is a complete or incomplete flower.
1. A complete flower has four principal parts: sepals, petals, stamens, and pistil.
2. An incomplete flower does not have all four principal parts. Examples are wheat and oats, which do not have sepals and petals.

20. Monoecious
Plant species that have both male and female flowers on the same plant are known as monoecious plants.
- Examples: corn, cucumber and pecan.

21. Dioecious
Plant species with the male flowers and female flowers on separate plants are known as dioecious plants.
-Examples: holly, date, palm, ginkgo, and muscadine grape.

22. Monocot vs. Dicot Monocots - flower parts in multiples of 3
Dicots - flower parts in multiples of 4 or 5

23. Pollination and Fertilization
Pollination - when a pollinator transfers pollen grains from anther to stigma
Fertilization - when pollen fuses with the egg cell
VIDEO:
Keyword: Pollen Trip; Title: The Pollen Trip

25. Influence on Flower Formation
Photoperiodism - growth response of a plant to the length of day
Vernalization - process by which floral induction in some plants is promoted by exposing the plants to cool temperatures for a certain length of time

26. Phytochrome - pigment in cytoplasm of green plants; associated with the absorption of light that affects growth, development, and differentiation including flowering of a plant, independent of photosynthesis
Anthesis - release of pollen from the anther

27. Review/Summary What are the major parts of flowers?
What reproductive structures exist in the flower and what are their functions?
How is a monocot flower different from a dicot flower?
What is the difference between pollination and fertilization?
Describe environmental factors that can influence the beginning of the flowering process.