Plantae (Metaphyta) A kingdom that includes all the plants. The earliest true plants were probably unicellular green algae (see ALGA), which first appeared in the Precambrian. The Bryophyta (mosses and liverworts) are known from the Devonian, and the first recorded vascular plants (Tracheophyta) date from the Silurian.

Plantae (Metaphyta) A kingdom that includes all the plants. The earliest true plants were probably unicellular green algae, which first appeared in the Precambrian. The Bryophyta (mosses and liverworts) are known from the Devonian, and the first recorded vascular plants (Tracheophyta) date from the Silurian.