#### Mosses and liverworts

Mosses and liverworts are the oldest land plants. They have a stem and structures resembling leaves and roots. Unlike other land plants, they lack a vascular system (a special tissue to transport water and nutrients).

#### Ferns and horsetails

Ferns and horsetails have distinct stems, leaves, and roots. They are the oldest vascular plants. This means that, unlike mosses and liverworts, they do have a vascular system that transports water and nutrients through their bodies.