Botrychium lanuginosum
- Citations total:
- 2
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| details | Recent | Nd | Knox,E.M. The spores of Pteridophyta, with observations on microspores in Coals of Carboniferous age. | 1939 | |
| details | Tiffanian | Canada(Alberta) | Rothwell,G.W. et al. Fossil Ophioglossales in the Paleocene of Western North America | 1989 |