(Seed) ferns from the Piesberg and Ibbenbüren
With this key it should be possible to identify several ferns and seed
ferns from the Upper Carboniferous (Westfalian B, C and D) of the Piesberg
near Osnabrück and Ibbenbüren in Germany.
All cited species occur in the Piesberg (Westfalian C and D) and/or in Ibbenbüren (Westfalian B and C). The photos are taken from specimens of my own collection.