Structure of FlowersP. 122

Petals and Sepals• Sepals – outermost

circle of flower parts that encloses a bud before it opens

• Petals – brightly colored structure just inside the sepals that attracts insects for pollination

Male• Stamen – Male part of

the flower; made up of an anther and a filament

• Filament – a long thin structure that supports an anther

• Anther – flower structure in which pollen grains are produced

Female• Carpel – innermost part

of the flower that produces female gametes

• Stigma – sticky portion at the top of the style where pollen grains frequently land

• Style – narrow stalk of the carpel in a flower

• Ovary – contains one or more ovules

Flowering Plant Life Cycles

• Annuals: complete a life cycle within one growing season

• Biennials: complete a life cycle in two years

• Perennials: flowering plants that live for more than two years

Pollen Ovary and Ovules