Which plant is found on more continents, Cortaderia or Thermopsis?
Cortaderia Cortaderia is a genus of South American and Central American plants in the Poaceae grass family.
Ceratophyllum demersum Ceratophyllum demersum, commonly known as hornwort, rigid hornwort, coontail, or coon's tail, is a species of "Ceratophyllum". It is a submerged, free-floating aquatic plant, with a cosmopolitan distribution, native to all continents except Antarctica. It is a harmful introduced weed in New Zealand. It is also a popular aquarium plant.