Can Fraxinus and Onoclea both be found in North America?
Fraxinus: Fraxinus , English name ash, is a genus of flowering plants in the olive and lilac family, Oleaceae. Fraxinus:  The genus is widespread across much of Europe, Asia and North America. Onoclea: Onoclea is a genus of plants in the Onocleaceae family, native to moist habitats in eastern Asia and eastern North America.
yes