Although this mod is known for its prehistoric creatures, it adds several prehistoric plants as well. All prehistoric plants must be created by the player and do not spawn in the world. They make for beautiful decorations at a base or in an enclosure, and some of them can be used for feeding herbivores.

A 7.2 stegosaurus with some zamites, dillhoffia, and welwitschia.
ALPHABETIC LIST OF PLANTS
CREATION
To create a prehistoric plant, one must acquire a plant fossil from mining fossil blocks or sifting. Analyzing a plant fossil can yield either a petrified Palaeoraphe sapling, petrified Calamites sapling, or a random fossilized seed or spore.
These items should be placed in a culture vat, which will turn it into living saplings, seeds or spores. Watch out, though, because if the cultivation fails it will spawn a failure plant, which drops a random fossilized seed or spore upon breaking.
The living items must be placed on grass or dirt blocks. Most plants spawn in an adult form, with ferns and Palaeoraphe trees as the exception.