title: Mammillaria laui
text: # Mammillaria laui
  
  Mammillaria laui is a species of cactus in the genus Mammillaria, native to Tamaulipas state in Mexico. A number of subspecies were described, occurring along an elevation gradient; these are no longer accepted. It is listed as Critically Endangered (CR) in the wild. As Mammillaria lauii it has gained the Royal Horticultural Society's Award of Garden Merit.
  
  