Vascular Plants with Seeds

Vascular Plants with Seeds

These plants do not require water for sexual reproduction. They reproduce by seeds rather than spores. Seeds are multicellular and contain a young plant called an embryo.

All seed plants have vascular tissue that transports water and nutrients throughout the plant.

They also have roots, stems, and leaves.

Characteristics of Seed Plants

Vascular Plants with Seeds

Gymnosperm Angiosperms

Two main groups of seed plants:

There are two groups of seed plants—cone-bearing gymnosperms and flowering angiosperms.

In gymnosperms, seeds are produced in a cone.

Different types of gymnosperms include conifers, cycads, ginkgoes, and gnetophytes.

Gymnosperms

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• the seed plants that do not first produce a flower before the seed

• means "naked seed" - produce seeds not covered by the walls of an ovary

• do not form flowers or fruits

• produce cones or cone-like structures

gymnosperms

Gymnosperms - conifers

Gymnosperms - cycads

Gymnosperms - ginkgoes

Gymnosperms - gnetophytes

There are more than 260,000 species of flowering plants, or angiosperms.

Almost all of the food eaten by humans comes from angiosperms or from animals that eat angiosperms.

Angiosperms

angiosperms• The Flowering Plants – means “covered seed”

• All have seed enclosed in a fruit

• All have flowers (not all are colorful blossoms - corn tassels and catkins of oak trees)

Angiosperms produce seeds that are part of a fruit.

Fruit grows from parts of a flower.

All angiosperms produce flowers.

Angiosperms

CORBIS

Annuals Biennials Perennials

Angiosperms – sub divisions

Plants that grow, flower, and produce seeds in one growing season are called annuals.

Angiosperms - Annuals

Biennials complete their life cycles in two growing seasons.

During the first year, the plant grows roots, stems and leaves.

In the second growing season the plant produces new stems, leaves, flowers, and seeds.

Angiosperms - Biennials

Perennial plants, like trees and shrubs, can live for more than two growing seasons.

Flowering plants are organized into two groups—monocots and dicots.

These groups are based on the number of leaves in early development, or cotyledons, in a seed.

Angiosperms - Perennials

angiosperms

Flowering plants are organized into two groups—monocots and dicots.

These groups are based on the number of leaves in early development, or cotyledons, in a seed.

Angiosperms subcategories

• Monocots• Dicots

Gymnosperms vs Angiosperms