Flower Anatomy
•
1—
Petal
Stigma
Anther
(receives the
pollen during
fertilization)
(contains pollen,
the male
reproductive cell)
Stile
(a tube on top
of the ovary)
Filament
03
eD
(holds the anther)
Ovary
(female reproductive organ)
Petal
rr
Ovule
(reproductive cell which
will become the seed
when fertilized by pollen)
Calyx
(all the sepals)
Sepal
(small leaves under
the flower)
Peduncle
(Stem)
@En chantedLearning.corn
he Flower:
The flower is the reproductive unit of some plants (angiosperms). Parts of the flower include petals, sepals, one
or more carpels (the female reproductive organs), and stamens (the male reproductive organs).
The Female Reproductive Organs:
The pistil is the collective term for the carpel(s). Each carpel includes an ovary (where the ovules are produced;
ovules are the female reproductive cells, the eggs), a style (a tube on top of the ovary), and a stigma (which
receives the pollen during fertilization).
The Male Reproductive Organs:
Stamens are the male reproductive parts of flowers. A stamen consists of an anther (which produces pollen) and
a filament. The pollen consists of the male reproductive cells; they fertilize ovules.
Fertilization:
Pollen must fertilize an ovule to produce a viable seed. This process is called pollination, and is often aided by
animals like bees, which fly from flower to flower collecting sweet nectar. As they visit flowers, they spread
pollen around, depositing it on some stigmas. After a male's pollen grains have landed on the stigma during
fertilization, pollen tubes develop within the style, burrowing down to the ovary, where the sperm fertilizes an
ovum (an egg cell), in the ovule. After fertilization, the ovule develops into a seed in the ovary.
Types of Flowers:
oime flowers (called perfect flowers) have both male and female reproductive organs; some flowers (called
flowers) have only male reproductive organs or only female reproductive organs. Some plants have
ilkbothperfect
male and female flowers, while other have males on one plant and females on another. Complete flowers
have stamens, a pistil, petals, and sepals. Incomplete flowers lack one of these parts.
Flower Basics
Name
1. Label the parts of the flower shown in the diagram below.
2. Identify each part of the flower described below using the words in the word list.
- The female part of a flower
- A small plant that is just starting to grow
- The place where pollen develops and is stored
- The female sex cell in a plant
- Occurs when the sperm and egg cells unite
- A sugary substance that attracts insects
- The male sex cell in a plant
- The male part of a flower
- The stalk that supports the anther
- The part of the pistil that receives the pollen
- Part that connects the stigma and ovary
Word List:
Anther
Fertilization
Filament
Fruit
Imperfect
Nectar
Ovary
Perfect
Petals
Pistil
Pollen
Seedling
Sepals
Stamen
Stigma
Style
- Protective leaf-like enclosure for the flower bud
- The ripened ovary of a plant that contains seeds
- Flower that contains both male and female parts
- Flower that lacks either male or female parts
- The structures that make up the outside of the flower and may be colored or contain nectar
or perfume glands
Image: http://www.smithlifescience.com/SciFlowerDiagramBlank.jpg
T. Trimpe 2010 Worksheet developed for use with the "Our Flowering World" video from United Streaming.