Vestiges Of The Natural History Of Creation

The book explores the flora of the Carboniferous era, emphasizing the dominance of cellular or cryptogamic plants, which make up two-thirds of the era's vegetation. It suggests that the actual diversity may be even greater if more of the flora were known. While the identified dicotyledons, or higher-class plants, are relatively few, their presence and variety are shown to have increased over time as the planet evolved.