Which plant grows further North, Zamia or Vallea?
Zamia Zamia is a genus of cycad of the family Zamiaceae, native to Mexico, the West Indies, and Central and South America as far south as Bolivia. The range of one species ("Z. integrifolia", extends into the contiguous United States, i.e. Georgia and Florida.
Ceratozamia vovidesii Ceratozamia vovidesii is a species of cycad in the family Zamiaceae endemic to the Sierra Madre de Chiapas of Mexico.