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Flowers. Hey good looking, what you got cooking?. What is the function of a flower?. The Peduncle is the stalk of the flower It supports the flower The Receptacle is the top of the peduncle. It swells to support the flower. Flower parts in common.

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Hey good looking, what you got cooking?

flower parts in common

The Peduncle is the stalk of the flower

    • It supports the flower
  • The Receptacleis the top of the peduncle.
    • It swells to support the flower
Flower parts in common

First outermost whorl

  • The whorl of sepals is called a calyx
  • Sepals are usually green
  • They protect the flower when the bud is closed

2nd Whorl

  • The whorl of petals is called the corolla
  • Color and arrangement target specific pollinators
  • Together the sepals and petals are the perianth
stamens male parts

3rd Whorl

  • Plants can have few or many
  • 2 parts
    • Anthers-little bags of pollen
    • Filaments- narrow stalks that support the anther
Stamens-male parts
carpels female parts

Most Central

  • Carpels fuse to form pistils
  • 3 parts
    • Stigma-the tip where pollination occurs
    • Style-long tubular part
    • Ovary-swollen base
Carpels-female parts
i like to move it move it

Flowers look so different because each have different strategies to collect and move pollen.

  • Some rely on animal helpers, while others use the wind
I like to move it, move it
i like to move it move it1

If you want to use a bee:

    • Bees see blue and violet best
    • Some petals have designs invisible to humans and visible to bees
I like to move it, move it
if you prefer a moth

White is easier to spot in the night when moths are active

  • You can smell in the dark! Flowers that use moths have strong smells
If you prefer a moth….
if a hummingbird is more your speed

They see red really well

  • They will keep coming back for nectar
  • Long beaks can access nectar at the base of long tubes, so fuse those petals up
If a Hummingbird is more your speed
if you prefer a beetle or fly

You’re probably pretty gross

  • Beetles and flies are attracted to rotted meat; flowers mimic that in appearance
  • The smell of urine is irresistible to this crowd, so the flowers mimic that too
If you prefer a beetle or fly….
if you can t resist the wind
Skip the petals!

Flowers on grasses have no corolla so the pollen can come and go as it will

If you can’t resist the wind
can you remember what an infloresence is

Can you remember what an infloresence is?

Remember it was something you had seen before


Infloresence made of tightly packed flowers

  • They droop and may lack petals
  • Examples include willow and birch
head or capitulum

Sunflowers may look like single flowers BUT they are actually a Head type infloresence.

  • The part that looks like petals is made of ray type flowers
  • The flowers that look like the center is made of disk type flowers
  • They are arranged on a single receptacle.
Head or Capitulum

Flowers branch from a rachis

  • Flowers have short pedicles
  • Flowers bloom from base to tip

Many short flowering stems begin at the same point on a main stem

  • Look like spokes of an umbrella
  • Example: Queen Anne’s Lace