Filicales synonyms

Filicales and Gymnosperms, and known as the Cycadofihices, a group in which, curiously enough, the reproductive organs remained undiscovered for some time after the anatomy of the vegetative organs was sufficiently well known to afford clear evidence of their true affinities.

The Sphenophyllales are only known in a fossil state, while the Equisetales, Lycopodiales and Filicales include both living and extinct representatives.

It remains to be mentioned that the Isoetaceae have been regarded as more nearly allied to the Filicales than to the former, near which they are here placed.