Question: Which plant has more species, Asarina or Glottiphyllum?

Context paragraphs:
Glottiphyllum cruciatum: Glottiphyllum cruciatum is a species that are part of over 50 succulents that are subtropical plants of the family "Aizoaceae".  The plant has many synonyms including "Glottiphyllum angustum".

Glottiphyllum: Glottiphyllum is a genus of about 57 species of succulent subtropical plants of the family "Aizoaceae".

Glottiphyllum longum: Glottiphyllum longum is a species of succulent plant in the Aizoaceae family, native to South Africa.

Asarina: Asarina is a flowering plant genus of only one species, Asarina procumbens, the trailing snapdragon, which is native to southern Europe.  Originally placed in the Scrophulariaceae (figwort family), the genus has more recently been moved to the Plantaginaceae (plantain family).  Species from North America formerly placed in the genus "Asarina" are now placed in "Holmgrenanthe", "Lophospermum", "Mabrya" and "Maurandya", as well as "Neogaerrhinum".  "Asarina" is now regarded as exclusively an Old World genus.

Glottiphyllum uncatum: Glottiphyllum uncatum is a species of succulent plant in the Aizoaceae family, native to South Africa.

Supporting paragraphs: Asarina Glottiphyllum
Answer: Glottiphyllum