Azolla colwellensis
- Citations total:
- 3
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| original | Late Eocene | England(Isle of Wight) | Collinson,M.E. A new multiple-floated Azolla from the Eocene of Britian with a brief review of the genus. | 1980 | |
| details | Bartonian | Priabonian | Worldwide | Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. | 1989 |
| details | Late Eocene | England | Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores | 1990 |