A favorite stand of equisetum, a primitive plant, was still there, reminding me that some species can last for eons.

The only living things that had ever existed there were a few primitive plants and their slightly less degenerate ancestors.

Then these primitive "plants" themselves turn out to be pretty rich sources of assimilable chemicals.

These early forms probably ate mosses and primitive vascular plants.

An ancient and primitive plant, usually under 10 centimetres tall, it is often seen in sunny moist areas.

Which of these primitive plants was genetically closest to the first flowering plants?

Some liken them more to primitive plants, and others put them in a third category.

Cycads are primitive plants that have existed for nearly 200 million years.

At that time, a century past, New Mars had been ideal for primitive plants.

Consider the cabbage, a primitive plant with distinct personality problems.