flowers the reproductive structures of plants. 4 parts of a plant roots stems leaves reproductive...

Flowers

the reproductive structures of plants

4 parts of a plant

• Roots• Stems• Leaves• Reproductive

(includes flowers and fruits)

Flowers have 4 different parts

•Sepals•Petals•Stamens•Pistil

Pedicel

•The flower stem

Receptacle

• The place on the stem where floral organs attach and originate.

Sepals

• Usually green; leaflike structures that protect the flower, as it forms

and emerges.

• Sometimes sepals are colorful

Calyx

• The group of sepals on a flower

Petals

• Located just inside the sepals

• Leaf-like and often very colorful

• Attract pollinators

Corolla

• The collection of petals on a flower

Perianth

• The sepals and the petals of a flower. (Not the reproductive parts.)

Tepals

• When there is no clear distinction between the sepals and the petals...they are called “tepals”.

The reproductive parts

• Found at the center of the flower

Stamens

• Male reproductive parts of a flower• Arranged around the female parts

Anther

• Part of the stamen

• Produces and holds pollen

Filament

• Stalk that holds up the anther

Pistil

• The female part of the flower

Stigma

• Found at the end of the pistil

• Has a sticky surface to catch pollen

Style

• The neck of the pistil

Ovary

• Part of the pistil that contains the ovules

Ovule

• The part of the flower in which the eggs are produced and seeds develop

Complete flowers

• Have all 4 basic parts:• Sepals, petals, stamens and pistil

Incomplete flowers

• Flowers that are missing one of the four basic parts

Perfect Flowers

• Flowers that have both male and female parts

Imperfect flowers

• Flowers that lack one of the sex structures