Which genus, Farfugium or Comptonia contains more species?
Comptonia (plant) Comptonia is a monotypic genus (containing only Comptonia peregrina) in the family Myricaceae, order Fagales. It is native to eastern North America, from southern Quebec south to the extreme north of Georgia, and west to Minnesota. The common name is sweetfern or sweet-fern, a confusing name as it is not a fern.
Frankia Frankia is a genus of nitrogen-fixing, filamentous bacteria that live in symbiosis with actinorhizal plants, similar to the "Rhizobium" bacteria found in the root nodules of legumes in the Fabaceae family. Bacteria of this genus also form root nodules.