Between Platycarya and Houttuynia, which has more species within the genus?
Platycarya Platycarya is a genus of flowering plants in the family Juglandaceae, usually treated as comprising a single species Platycarya strobilacea, though one to two additional species are accepted by some authors. It is native to eastern Asia in China, Korea, and Japan.
Honckenya Honckenya peploides, the sea sandwort (UK) or seaside sandplant (Canada), is the only species in the genus Honckenya of the flowering plant family Caryophyllaceae. Other common names include sea chickweed, sea pimpernal and sea-beach sandwort. The scientific name is often spelled ""Honkenya"", and is named after the German botanist Gerhard August Honckeny (or Honkeny). This plant has a circumboreal distribution.