Flowers - PowerPoint PPT Presentation

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Flowers

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  1. Flowers Hey good looking, what you got cooking?

  2. What is the function of a flower?

  3. 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

  4. The parts are formed or arranged in whorls • Sepals • Petals • Stamens • Carpels All Flowers Have 4 Basic Parts

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

  6. 2nd Whorl • The whorl of petals is called the corolla • Color and arrangement target specific pollinators • Together the sepals and petals are the perianth Petals

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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….

  12. 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

  13. 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….

  14. 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

  15. Can you remember what an infloresence is? Remember it was something you had seen before

  16. Infloresence made of tightly packed flowers • They droop and may lack petals • Examples include willow and birch Catkins

  17. 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

  18. Flowers branch from a rachis • Flowers have short pedicles • Flowers bloom from base to tip Racemes

  19. Many short flowering stems begin at the same point on a main stem • Look like spokes of an umbrella • Example: Queen Anne’s Lace Umbels