Question: Which plant genus consists of more species, Dryopteris or Cyperus?
Sentence (from "Dryopteris cristata"): This plant is a tetraploid species of hybrid origin, one parent being "Dryopteris ludoviciana" and the other being the unknown, apparently extinct species, dubbed "Dryopteris semicristata", which is also one of the presumed parents of "Dryopteris carthusiana".
Relevant evidence: No