the flower vocabulary an organ of sexual reprodution diagram

Flower Receptacle Sepal Calyx Petal Corolla Pistil Style Ovary Ovule Stamen Anther	Filament Pollination Self-pollination Cross-pollination Fertilization Pollen grain Tube cell Pollen tube Generative cell Sperm cell Zygote Fruit	Dry Fleshy Simple Aggregate Multiple Seed Seed coat Cotyledon Radicle Hypocotyl Epicotyl Germination Seed dispersal

The Flower: an organ of sexual reproduction

What part of a flower are you eating when you eat an apple?

Flowers are composed of modified leaves. Each floral structure represents a different modification of a leaf. Not all flowers have the same parts, but male and/or female structures are essential.

Parts of a flower: 

 Receptacle: (#6)

• The swollen tip of the stalk (#7) supporting the flower.
• You might think of a flower as a highly modified branch, the flower parts being highly modified leaves.

 Sepal: (#5)

• The outer floral structure.
• Most sepals are green, but they can be brightly colored like the petals.
• Sepals protect the flower before blooming.
• All the sepals together are called the calyx.

 Petal: (#4)

• Attached just inside the sepals.
• Usually brightly colored to attract pollinators.
• All the petals together are called the corolla.

 Pistil:  the female organ.

• Stigma (#1), the open top of the pistil. It is sticky so it can trap pollen grains.
• Style (#2), the hollow tube leading to the ovary.
• Ovary (#3), composed of fused ovules.
• Ovules, each ovule produces one egg cell.

Stamen:  the male organ. Anther (#9), produces pollen grains which contain sperm cells. Filament (#8), supports the anther.