- Author:
- Hall,J.W.
- Year:
- 1970
- Title:
- A new section of Azolla.
- Reference:
- Hall,J.W. (1970) A new section of Azolla. Taxon Vol. 19 # 2 P. 302- 303
- Google Academy:
- try to search by title in english
| Genus | Species | Country(Region) | From | To |
|---|---|---|---|---|
| Azolla | Azolla geneseana | Canada | Nd | |
| Azolla | Azolla primaeva | Canada | Eocene | |
| Azolla | Azolla simplex | Montana | Cretaceous | |
| Simplicispora | Simplicispora | Canada | Eocene |