Nappalassë

The '''Coca-Plant is not native to middle-earth, however several species of related plants are known including:
 * Joef
 * Valanar
 * Witav
 * Welwal

Speculations
The ancestors of the mentioned plants may have been brought to Middle-Earth by the Númenoreans, similar to their introduction of Galenas or Pipeweed and Athelas.The Origin of these plants may lie in the unknown areas of Ambar, presumably the New Lands or Easternesse