Which has more species, Lysichiton or Aechmea?
Lysichiton:  The genus has two species, one found in north-east Asia (Japan and Russian Far East), the other in north-west America (Aleutians to Santa Cruz County in California). Aechmea:  "Aechmea" has 8 subgenera and 255 species distributed from Mexico through South America.
Aechmea