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Flowers Flowers Location of sex organs of plant Some may be showy to attract pollinators while others are not The number of certain parts indicates if it is a dicot or monocot Flowers consist of whorls of parts Flower Parts Peduncle Stem that solitary flowers on Receptacle

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flowers2
Flowers
  • Location of sex organs of plant
  • Some may be showy to attract pollinators while others are not
  • The number of certain parts indicates if it is a dicot or monocot
  • Flowers consist of whorls of parts
flower parts
Flower Parts
  • Peduncle
    • Stem that solitary flowers on
  • Receptacle
    • Where all flower parts are attached

Peduncle

Receptacle

flower parts4
Flower Parts
  • Sepals
    • Normally non-colored leaves of flower
    • Non-fertile
    • If colored, called “tepals
  • Calyx
    • All sepals together

Sepals

= Calyx

flower parts5
Flower Parts
  • Petals
    • Colored leaves of flower
    • Non-fertile
    • Used to attract pollinators
  • Corolla
    • All petals together

Petals

= Corolla

flower parts6
Flower Parts
  • Perianth
    • Consists of both non-fertile whorls
    • Calyx + Corolla

Petals

= Corolla

Perianth

Sepals

= Calyx

flower parts7
Flower Parts
  • Male Parts
  • Filament
    • Stalk that bears the

Anther

  • Anther
    • Pollen bearing organ

Filament

Stamen

  • Stamen
    • Filament + Anther
flower parts8
Flower Parts
  • Female Parts
  • Stigma
    • Sticky pad for pollen to adhere to

Stigma

Style

  • Style
    • Long, slender portion for pollen to grow through

Ovary

  • Ovary
    • Where the ovules (“eggs”) are
  • Pistil
    • Stigma + Style + Ovary

Stigma + Style + Ovary = Pistil

monocot vs dicot
Monocot vs. Dicot
  • Monocots and dicots can be most easily determined by their male / female parts
  • Monocots
    • Flower parts are in 3s
  • Dicots
    • Flower parts are in 4s, 5s, or many
classification of flowers
Classification of Flowers
  • Complete
    • Flower has all 4 whorls of organs
      • Sepals, petals, stamen, pistil
  • Incomplete
    • If flower is missing at least one of the whorls of organs
classification of flowers11
Classification of Flowers
  • Perfect
    • If the flower has both sex whorls
      • Stamen + Pistil
  • Imperfect
    • If either sex whorl is missing
  • Pistillate
      • Only pistils are present
  • Staminate
      • Only stamen are present
classification of flowers12
Classification of Flowers
  • Monecious
    • A plant with both pistillate and staminate flowers on it
      • Ex. Oak, corn, begonias
  • Dioecious
    • A species with staminate and pistillate flowers on separate plants
      • Ex. Asparagus, holly, Ginkgo
placement
Flowers can either be borne singly or in inflorescences

Inflorescence

A cluster of flowers often looking like one flower

Some examples

Umbel

Raceme

Panicle

Corymb

Placement
placement14
Placement

Umbel

Panicle

Corymb