Which plants has more native areas, Rehmannia or Sauromatum?
Rehmannia: Rehmannia is a genus of six species of flowering plants in the order Lamiales, endemic to China. Sauromatum: Sauromatum is a genus of flowering plants in the family Araceae. Sauromatum:  The genus is native to tropical Africa, tropical Asia, and the Arabian Peninsula.
Sauromatum