Spathiphyllum is a genus of about 40 species of monocotyledonous flowering plants in the family Araceae, native to tropical regions of the Americas and southeastern Asia.
 Certain species of "Spathiphyllum" are commonly known as Spath or peace lilies.
Titanopsis is a genus of about 10 species of succulent plants of the family Aizoaceae, indigenous to the arid regions of South Africa and Namibia.

Question: Which one has the most species, Titanopsis or Spathiphyllum?
Answer: Spathiphyllum