| { | Cambrian, Silurian, and Devonian | 73 | |
| Palæozoic | { | Carboniferous | 683 |
| { | Permian | 97 | |
| { | Triassic | 115 | |
| Mesozoic | { | Jurassic | 294 |
| { | Cretaceous | 183 | |
| { | Eocene | 414 | |
| Cainozoic | { | Miocene | 496 |
| { | Pliocene | 35 | |
| Recent | Post-Pliocene | 31 | |
| —— | |||
| Fossil Species. | 2421 |
During the twenty years that have elapsed since this enumeration was made, the number of fossil species has been very greatly increased. The proportion exhibited in this table is likewise greatly altered from the enormous additions made to the Tertiary Flora by Unger, Ettingshausen, and Heer, and from the important contributions by Principal Dawson to the Devonian Flora.
Among the fossil Thalamifloral Dicotyledons, Unger mentions species belonging to the orders—
Magnoliaceæ.
Anonaceæ.
Nymphæaceæ.
Capparidaceæ.
Malvaceæ.
Byttneriaceæ.
Tiliaceæ.
Aurantiaceæ.
Malpighiaceæ.
Aceraceæ.
Sapindaceæ.
Cedrelaceæ.
Zygophyllaceæ.
Xanthoxylaceæ.
Coriariaceæ.
Among Calycifloral Dicotyledons—
Celastraceæ.
Rhamnaceæ.
Anacardiaceæ.
Amyridaceæ.
Leguminosæ.
Rosaceæ.
Calycanthaceæ.
Combretaceæ.
Melastomaceæ.
Myrtaceæ.