Plants are divided into groups.
Almost all plants belong to the group called seed plants. They’re called seed plants because they make seeds that grow into new plants.
Most seed plants are flowering plants. Flowering plants make their seeds inside flowers. By far, most plants in the world are flowering plants. Other seed plants make their seeds inside cones. Cone-bearing plants are called conifers. These plants include such trees as pines, spruces, and firs. Plants called cycads and ginkgoes (also called maidenhair trees) also are cone-bearing plants. These types of plants have been around for millions of years.
Other plant groups use tiny cells called spores, not seeds, to make new plants. Spore-making plants include ferns, horsetails, and mosses.
Ferns have feathery leaves called fronds. Their spores form on the undersides of the fronds. Horsetails have tall, green stems with a cap on top. They have long, thin leaves. Moss grows like a soft, green furry coat on a tree trunk or a rock. Moss is made up of thousands of tiny plants growing very close together.
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