Which cacti has more species, Cereus or Limnanthes?
Limnanthes Limnanthes, the type genus of the family Limnanthaceae, consists of annual herbaceous plants commonly known as the meadowfoams. The seven species are all native to coastal and adjoining regions (inland valleys, foothills and mountains) of western North America, where they typically grow in marshy habitats, such as the margins of vernal pools. Some are endemic to California
Cephalocereus Cephalocereus is a genus of slow-growing, columnar-shaped, blue-green cacti. The genus is native to Mexico. For more information see Old-Man Cactus.