Seems like it's 55M years old, so on the younger end of the list. But it might take a bit more digging to confirm that. https://www.fs.fed.us/database/feis/pla

Seems like it's 55M years old, so on the younger end of the list. But it might take a bit more digging to confirm that. https://www.fs.fed.us/database/feis/plants/fern/pteaqu/all.html#192 https://www.fs.fed.us/database/feis/plants/fern/pteaqu/all.h... Please feel free to contribute! https://github.com/bcherny/bcherny.github.io/edit/main/_posts/2022-01-17-Dinosaur-food.md https://github.com/bcherny/bcherny.github.io/edit/main/_post...