Which flowering plant is native to Central America, Helictotrichon or Odontonema?
Helictotrichon Helictotrichon (alpine oatgrass) is a genus of perennial flowering plants in the grass family.. Genus name comes from the Greek heliktos meaning twisted and trichos meaning spine, referring to the shape of the awn.
Ageratina occidentalis Ageratina occidentalis is a species of flowering plant in the daisy family known by the common name western snakeroot or western eupatorium. It is native to the western United States where it grows in several types of habitat. It is found in California, Oregon, Washington, Idaho, Montana, Nevada, and Utah.