The Flower. What is the function of the flower for the plant?. Reproduction of Flowering Plants. Accessory Flower Parts Sepals – leaf like, green structures that encircle the flower stem beneath the petals
The Flower What is the function of the flower for the plant?
Reproduction of Flowering Plants Accessory Flower Parts • Sepals – leaf like, green structures that encircle the flower stem beneath the petals • Petals – leaf like, colorful structures arranges in a circle called a corolla around the top of a flower stem
Kinds of Flowers • Complete – a flower that has all 4 organs (sepals, petals, stamens and pistils) • Incomplete – a flower that lacks one or more organs • Male – have stamens but no pistils • Female – have pistils but no stamens
Reproductive Flower Parts • Stamen (male) • filament – the long structure that supports the anther • anther – the structure at the tip of the filament that produces pollen containing sperm
POLLEN GRAINS • A pollen grain is an immature male gametophyte. • Pollen grains are extremely durable; they have tough coats.
B. Pistil (female) • stigma – at the top of the pistil; a sticky or feathery surface on which the pollen grains land and grow • style – the slender stalk of the pistil that connects the stigma to the ovary • ovary – eventually becomes the fruit; contains the ovules • ovules – will become seeds if they are fertilized
The Female Pistil pistil
Use the diagram on page 612 to draw a typical flower and label the accessory and reproductive parts.
MONOCOT ORDICOT • Count the petals or stamen • Monocots = flower parts in multiples of 3 • Dicots = flower parts in multiples of 4 or 5
Is this plant a monocot or a dicot? How do you know? 3 petals, 3 sepals (or 6 tepals)