Ancient Plants / Being a Simple Account of the past Vegetation of the Earth and of the Recent Important Discoveries Made in This Realm of Nature

by Marie Carmichael Stopes

Genera living and fossil.

Fossils recognized as far back as the Cretaceous.

Cordaitales (see [p. 92]).

Cordaiteæ, e.g. Cordaites

Fossil only.

Characteristic of Devonian, Carboniferous, and Permian periods.

Poroxyleæ, e.g. Poroxylon

Fossil only.

Characteristic of the Carboniferous and Permian.

Ginkgoales (see [p. 98]).