- Author:
- Rothwell,G.W.;Stockey,R.A.
- Year:
- 1989
- Title:
- Fossil Ophioglossales in the Paleocene of Western North America
- Reference:
- Rothwell,G.W. et al. (1989) Fossil Ophioglossales in the Paleocene of Western North America American Journal of Botany Vol. 76 # 5 P. 637- 644
- Google Academy:
- try to search by title in english
| Genus | Species | Country(Region) | From | To |
|---|---|---|---|---|
| Botrychium | Botrychium lanuginosum | Canada(Alberta) | Tiffanian | |
| Botrychium | Botrychium wightonii | Canada(Alberta) | Tiffanian |