Called Hawthorn or Thornapple, Crataegus is in the Rosaceae family like apple trees, and it's possible to graft apple scion onto hawthorn branches. They can grow to be like large bushes or small trees. 
 
Our plant offerings are 12-24" tall and potted up in organic manure-based compost.
 
Because they are thorny, they can make protective hedges, and are also important habitat for birds and insects. The young leaves and flowers are edible. Their berries, or haws, can be used in jellies, wines, and traditional medicines. They are also a preferred food of cedar waxwings and other wildlife.