THE FLOWER

1
THE FLOWER

• Packet 74
• Chapters 30 38

2
THE PETALS

• The Petals

• Figure 30.7Page 598

• Petals are often brightly colored and of various
  shapes
• Aid in attracting pollinators
• Also considered sterile floral parts.
• Within the ring of petals are the fertile
  sporophytes, stamens and carpels.

3
STAMENS

• Stamens

• Figure 30.7Page 598

• The stamens are the male reproductive organs and
  is one of the fertile floral parts
• Sporophytes produce the microspores that develop
  into male gametophytes.
• Composed of a terminal sac called an anther
  where pollen is produced.
• Anther is also supported by a stalk called a
  filament.

4
CARPEL

• Carpel

• Figure 30.7Page 598

• Carpels are the female reproductive organs and
  are the fertile floral parts
• Sporophytes produce megaspores which develop into
  female gametophytes.
• The tip of carpel is a sticky stigma that
  collects pollen
• Style leads to the ovary at the base of the
  carpel
• Inside the ovary are ovules
• Develop into seeds if fertilized

5
ADAPTATIONS IN FLOWERS OVER THE YEARS

• In certain flowers, one or more of the four
  floral whorls have been eliminated.
• There are also a variety of flower shapes, sizes
  and colors which represent adaptations to
  pollinators.

6
FLOWER TERMINOLOGY
7
TERMINOLOGY

• Complete flowers
• Four floral whorls
• Incomplete flowers
• Lacking one or more of the four floral shorls
• Bisexual flower
• Have stamen and carpels
• Known as perfect flowers but can be complete or
  incomplete
• Unisexual flower
• Imperfect flowers
• Staminate flowers if only the male organs are
  present
• Carpellate flowers if only the female organs are
  present

8
TERMINOLOGY II

• Cucumber Plant and Female Ginkgo Tree

• Monoecious Plants
• Plants have staminate and carpellate flowers on
  the same plant
• Corn
• Cucumber
• Dioecious Plants
• Plants have staminate and carpellate flowers on
  different plants
• Ginkgos
• Date palms

9
REVIEW
10
REVIEW

• Students
• List potential examination questions and/or here,
  and on following slides, based on the packet.