Aloe ( or ), also written "Aloë", is a genus containing over 500 species of flowering succulent plants.
 The most widely known species is "Aloe vera", or "true aloe", so called because it is cultivated as the standard source of so-called "aloe vera" for assorted pharmaceutical purposes.
 Other species, such as "Aloe ferox", also are cultivated or harvested from the wild for similar applications.
Stigmaphyllon is a genus in the Malpighiaceae, a family of about 75 genera of flowering plants in the order Malpighiales.
 Amazonvine is a common name for species in this genus.

Question: Which contains more species, Stigmaphyllon or Aloe?
Answer: Aloe